Question about Bosch Smart Home Twinguard

I still have Powerline with WLAN installed in the basement and on the first floor.these are in a mesh system.the Twinquard is in the dining room.there are Bosch smoke detectors in the basement and on the first floor.I think if you amplify the WLAN signal this is not a problem.

I would say, the distance is probably too far.
I have the Bosch SHC II in the basement and I can barely reach the smoke detector two stories above, but the TwinGuard three stories above did have zero reception. I have concrete floors/ceilings.
I extended the range with two smart plugs to achieve better reception and lower the battery consumption: Bosch Smart Home Zwischenstecker Kompakt
Straight up or through a wall works always better than diagonal.

The signal doesn't even reach through a wooden floor. (new house)
horizontal 4m, vertical 3m
two walls, one floor (lightweight construction), already no signal.

I have the Twinguard on the 1st floor and the control unit in the basement with 2 concrete floors. Without Smsrte lamps as repeaters, it doesn't work.