Hydraulic balancing air-water heat pump + efficiency circulation pump

If the heating curve cannot be lowered any further, the base temperature can still be adjusted; it may also be possible to limit the supply temperature on the heat pump side

Update: Attached are the latest room temperatures, but I suspect they have partly risen due to the slightly higher outside temperature and external heat.

Above all, releasing the heating circuits with more volume flow causes the temperature to rise so significantly. The small difference in the outside temperature will not be felt as strongly inside the house. I would regulate something now. Turn down the flow rate in the bedroom to 0.5 initially, likewise in the utility room. Leave the rest as is. If the bedroom gets colder, you will lose heat in the bathroom, so I would initially not change the flow rate in the guest room. Is the bathroom above the utility room? A new decision will be made in 1-2 days.

Since it is a bungalow, all rooms are next to each other... The bathroom could become problematic, as already noted, if I throttle the adjacent bedroom and guest room too much... I would even want to throttle the technical/utility room so far that only the minimally possible flow passes through; the room is warm enough anyway due to external influences like the inverter, dryer, heating circuit distributor, and so on.

To avoid misunderstandings regarding the plan, the heating circuit distributor is not located in the hallway but in the utility room behind the door, practically under the meter cabinet opposite the heat pump.

Regarding flow temperatures, I can set/define minimal and maximal flow temperatures for the heating circuit... Additionally, I could also limit it using the compressor hysteresis.

Then there is enough leeway to get that efficiently.

So far as I can get to the flows, as of today I would:

Reduce the WC flow...
Reduce the utility room flow...
and then first see where the circulation pump is pushing the stuff, some heating circuit will then benefit from the reduced flow from the WC and utility room, that should be the one with the lowest pressure loss at that time, so the shortest one that is still left. That will probably be one of the two circuits in the hallway with just under 35 m.

Lower heating curve
Lower base
Limit flow
until the bathroom is fully open and the desired temperature is reached.

Only then would I start throttling.

I would throttle the large circuits, i.e. living room as well as utility room and bedroom, and observe how this affects the other circuits.