Empty conduits on the property - ideas? - It's not too late yet :)

A 1/2 inch faucet usually has an external thread (21mm). Therefore, it does not fit with the fitting with external thread. Use a Gardena (or cheap third-party manufacturer) on the faucet, a piece of garden hose with couplings+adapter, and then one of the mentioned fittings to connect to your line. The hose also has the advantage that you won't have problems if the faucet is quite deep. Thus, the bending radius does not matter (PE HD is quite stiff) and you can quickly switch if you ever need to access the water. For watering, you do not need a controller yet. You can open/close the valves in the valve box with a screwdriver.

just because the property is larger doesn't necessarily mean you need more sprinklers. Rather, only larger throw distances, unless it is very convoluted.
Even with 100 sprinklers, we're talking about €200 here. For something you have for many years. Much bigger amounts are spent on more pointless things in house construction.

Well, you know that I – like most probably – don’t have 10 m3/h available, so more zones are necessary -> more valves etc....
And €2 per sprinkler is not correct either. It's not only the nozzle that's needed, but also the riser and the connection line (including fittings) from the PE pipe to the sprinkler.

Morning folks, I’ve been giving some serious thought to where I’m going to dig my trenches now. It looks like a lot of work, especially since everything at the front is already compacted, so there’s no way around a trenching machine.
It would be 7 channels = 8-way distributor.
Any suggestions? Otherwise, it will be ordered and executed like this

I am currently mobile. Therefore, I will take a closer look at it later. Forget trenchers when the soil is compacted. Use a mini excavator.

So I'm at home at the computer.
Green: aren't you watering the corner top right? I don't see any sprinklers here.
Watering cans could be connected to one line. Saves one valve or one in reserve.
Pink: please make a separate circuit for the tree. It has a very different water requirement than the beds.
Blue: with that length, I would rather split it into two times 25 meters. Supply line from left and right. Keep in one circuit or better make each an extra circuit. Here also I suspect different water requirements.
Since you lay almost everything in a main trench anyway, you will need a mini excavator. With 4 lines and fittings, the trenches of a normal trenching machine are too narrow and/or not deep enough.
No irrigation on the left side of the house now? If still undecided, I would lay a line and put a cap on it. If you need it later, you won’t have to dig up your garden.

Different water requirements can also be compensated to some extent with the different drippers (different dripper rates). I have decided not to control the water doses by valve at all but to always have water running. I think that is more practical. Just a silly question. Do you really want to run the pipe all the way to the middle at the top left in Zone 3 and then back to the right? You could just take the sprinkler at the bottom right along with it. You have planned pressure-regulated risers, haven't you?