Integration of devices after changing gateway address

Hi there,
So far I have successfully operated my Homeassistant as follows. Raspi via LAN to Fritzbox, OpenDTU, Hoymiles inverter and ESP (for Victron charge controller) via repeater. I would now like to remove the repeater and have set up the Raspi as an access point via Access Point and successfully integrated the 3 WLAN devices into the “Raspi network”.
My main network is 192.168.10.xx, subnet, the Raspi network is 192.168.20.xx, subnet
Unfortunately, the WLAN devices are not recognized in HA. Need a tip/instructions on how to fix the problem. Thanks in advance

Translated with (free version)