These units can have a Tuya based controller: when you can pair it with the Tuya Smart app (install @ phone), you can add it to Homey per Tuya Cloud community app.
BTW this is a double post:
https://community.homey.app/t/connect-homey-pro-and-drl-e-comfort-klima-elektrische-radiator-met-wifi/138277?u=peter_kawa
Please add these links to your posts, so folks don’t waste their time on an already answered double post (they’re unaware of), thanks.