Your best bet would be to check which models are supported by Valetudo, which is a local-only firmware replacement: https://valetudo.cloud/ and https://github.com/Hypfer/Valetudo
valetudo is just a hack, not a firmware replacement, and could be blocked by a firmware update from the OEM
plus it can void your warranty
valetudo is just a hack, not a firmware replacement, and could be blocked by a firmware update from the OEM
plus it can void your warranty