Irrigation - Detailed Planning and Fundamental Issues

You do not need valves with pressure regulation.
These are only used when operating the valve boxes with high pressure (>6-8 bar and more). This is not the case for you (and most others).
This is done to achieve a high flow rate even over longer distances in the supply line.
Your pressure is within the working range of the sprinkler housings directly behind the pump, meaning you do not have to reduce the pressure.
So you can use normal valves (32 mm!).

As sprinkler housings, use the pressure-regulating PROS-04-PRS40-CV. This way, the pressure is regulated directly at the sprinkler head to 2.8 bar. The maximum pressure your pump reaches prevails in the circuit itself. As long as the pressure in the line is >2.8 bar, you have 2.8 bar at every sprinkler head no matter where it is positioned in the line.

For drip irrigation, I recommend the XFS Dripline. It can be operated up to 4.14 bar. Therefore, you do not need a pressure reducer and can operate it directly.
If you have more pressure or use a dripline that only operates at 1.8 bar, you install a pressure reducer directly at the beginning of the dripline (about 12 euros per circuit).
For drip irrigation, other fittings are also needed (16 mm or 17 mm). Simply connect your 32 mm line with a reducer fitting to a 3/4" external thread (if not available, use internal thread and adapter) with the "drip fitting."

Just as additional experience: I also use Hunter Mp myself, they work really excellently without any interference. I have 4 loops and can control each loop via a solenoid valve through my home automation. The installation is simple, and all components really make a robust impression.

Be sure to lay the control cable in a conduit. This way, you can replace it later without having to dig up the garden (and it can't be gnawed by rodents). Mark your valves so that you also know which valve controls which zone directly at the box. In the Hydrawise app, you can name the zones and add symbols as well as pictures.

do you have KNX or another control system?

Use Openhab plus mainly Z-Wave.

I actually wanted to get a sensor for soil moisture and then control it accordingly, but other projects somehow have priority right now. For the time being, I still have to press a button in my app, then the 4 zones run through once, watering with 15 liters per square meter, currently just by feel in terms of frequency (usually about every 3 days in phases without rain), but it works quite well.

- What is the logic behind your planned irrigation? How do you want to control when and how much is irrigated?