LAN and Wi-Fi "devices" per floor?

That was eight and a half years ago - yes, a bit of background information about the history in the meantime would not be wrong: has the house considered back then been moved into, is the search still ongoing, or is something new currently planned?

Hello, in the meantime a new house has been built and is about to be occupied. For the electrical installation, we trusted the electrician who said that if you have 1 LAN socket in every "important" room, it would be sufficient; you could then add something to expand the possibilities. So we now have one LAN each in the basement hobby room, living room on the ground floor, child 1 and child 2 as well as office 1 on the upper floor, and office 2 and bedroom in the attic. All LAN sockets are (unfortunately) at "knee height" or lower, that is on the wall. In the basement, according to the invoice, the electrician installed Rutenbeck patch panel access point Cat.6a, 12xRJ45 PP-Cat.6A Iso-12 Accesspoint - when I look this up at Rutenbeck, it could be this one (?): PP-Cat.6A iso-12 Accesspoint rw if this is the case, then according to the datasheet it has POE. if it has POE, then my question is whether I should take a POE access point, and whether I can create a second LAN socket (directly in the wall in front of the access point - is there still the possibility to plug a 2-port LAN socket into the wall?), or if there are access points with one LAN output (if yes, what would be recommended?), so that if needed, you can plug in another LAN cable there? Many thanks for the previous and in advance for further answers. Greetings from Tom

A patch panel is only the mechanical connection between the installation cables and the patch cables. What you mean is a switch. Do you already have one? What kind of router do you have? In the rooms where you need multiple connections, you can place a switch in each. But not the full performance. Don't fixate on APs with additional ports. There are constantly threads about this here. You had forever to prepare. Instead of informing yourself, you invest a lot of money and now you have a mess. How big is your budget? Since you have no idea about the subject matter, take a suitable FritzBox and the access points from Fritz.

For the electrical installation, we trusted the electrician who said that if you have 1 LAN socket in every "important" room, [...] All LAN sockets are (unfortunately) at "knee height" or lower,

What DO you want or where is your problem: do you read the kicker in the online edition during longer sessions in an "unimportant room" ... ?
You cannot expect any electrician to provide sockets for ceiling-mounted access points without special instructions; that should have been mentioned in the specifications (or you should/could/must have noticed that it was not included there).

A patch panel is only the mechanical connection between the installed cables and the patch cables. What you mean is a switch. Do you already have one? What kind of router do you have? In the rooms where you need multiple connections, you can put a switch in each. But not with full performance. Don’t fixate on APs with additional ports. There are constant threads about this here. You had ages of time. Instead of informing yourself, you invest a lot of money and now have the mess. How big is your budget? Since you have no idea about the subject, take a suitable FritzBox and the access points from Fritz.

No, I still need a switch. Is there a recommendation for that? We currently have a "standard cable router" from Vodafone since the end of 2020, which we apparently could “take over” i.e. continue to use, it says TG3442DE on the back; on the homepage for our WLAN the hardware type & version is listed as 9; since it doesn’t even have an answering machine, I was already thinking about a FritzBox; the Vodafone technician mentioned the 6 series, at least a cable router. I would adjust the budget to what is necessary. Since we have LAN in a total of 7 rooms and possibly 7 access points, I would not want to spend, for example, 200 EUR per access point, maybe rather around 50 - max 100 EUR, if that makes sense (?).

What DO you WANT or where is your problem: do you read Kicker in the online edition during longer sessions in an "unimportant room"...? You should not expect electricians to provide boxes for ceiling-mounted access points without special notice; that should have been mentioned in the tender (or you could/must/should have noticed that it was not included there).

No, I do not read Kicker online during longer sessions in an "unimportant room." My problem is that I am now looking for APs that still have a LAN port, or the question is whether that is unnecessary, or if there is the possibility to plug a "dual LAN connector" into one LAN socket, thereby having one connection for the access point and one for a LAN cable, or if that is overkill because there should be enough Wi-Fi in the room and LAN is hardly needed, and if it is, then the access point is removed from that LAN socket and, for example, the laptop is connected directly to the LAN socket with a cable?

If you use cheap APs, you have an old standard. Therefore, use a Fritz!Box and FritzRepeater2400. Set these up as APs. You will also have a LAN port at the access point.