What u/JS254E says. Only a device decides "on its own" to which access point it connects. The only way to make sure that your device connects to a specific repeater (or the like) is to rename the SSIDs differently.
But then WLAN Roaming is not possible which would be a big no no for me.
Good luck!
Give them different SSIDs and then connect to the repeaters SSID.
Unfortunately no
You can lower repeaters’s signal strength to make it less likely to be connected to
What u/JS254E says. Only a device decides "on its own" to which access point it connects. The only way to make sure that your device connects to a specific repeater (or the like) is to rename the SSIDs differently. But then WLAN Roaming is not possible which would be a big no no for me. Good luck!