Set up network with Unitymedia

The statement from the initial post was clearly about the network and not TV.
What I still haven’t understood is the statement "set up a Wi-Fi network in every room."

Basically, the cable comes from the street to your house connection point. There you have, as already shown above, the amplifier and splitter. After that, a cable goes from the distributor to the designated rooms (or possibly several, depending on the planning).

For the internet, you definitely need a cable modem. Either the Vodafone box from Unitymedia (or now Vodafone) or your own/rented Fritzbox Cable (e.g. 6951).

For installation, you have two options now:
1) Central in the technical room (or your cabinet)
This means you connect your cable modem directly after the distributor and then lay the network cables to the various rooms, for example via a patch panel. However, there might not be enough space in the distribution box overall for this.

2) In one room
You will have several rooms with a TV socket; you can theoretically connect the cable modem there. But then distributing the network to the other rooms is no longer possible or very cumbersome, leaving only distribution via Wi-Fi.

How many rooms and square meters are we talking about that should be covered with Wi-Fi?

Thank you for the detailed answer. So of course not Wi-Fi in every room but only over two floors plus LAN for TV approx. 180m2 very open design. If I understand correctly, this means I still have to get splitters and amplifiers installed by a Unitymedia technician for the connection of my Connect Box? Then patch switch and access point done.

Quick question: is this a condominium or a single-family house?

//Edit: Ok, understood, condominium.

Quick question: is this a condominium or a single-family house?

//Edit: Ok, I understood it's a condominium.

Then it will likely be set up as follows:
Somewhere in the house, the cable comes into the basement at the house transfer point. The amplifier and splitter (for the house) will also be installed there. You usually find this near the electricity meters.

From there, a cable goes to the distribution box in your apartment. According to your picture, a 4-way splitter is installed there, which divides the one cable into 4 cables. These cables then go from the distribution box to your 4 rooms.

I don't see any network cables there anywhere, so I'll leave that topic out for now. Or do you have a network outlet installed in the rooms?

From my point of view, you have two options:
1) simple variant -> connect the cable modem from Unitymedia (Vodafone Station or Fritzbox) to the TV/multimedia outlet in any room and then use Wi-Fi in the other rooms.
2) the more complex variant -> replace the 4-way splitter with a 5-way splitter and install the cable modem in the distribution cabinet. But that will be more difficult because of limited space, and when you go from a 4-way to a 5-way splitter, the signal must be measured and adjusted again, because due to the resulting attenuation it may no longer be sufficient.

I assume you have a TV/multimedia outlet in 4 rooms? Or do they still need to be installed?