Hope here are some people from Germany, or with knowledge about working devices, using ESPHome and have converted some cheap plug from Tuya to use with ESPHome and Home Assistant.
Needed
Should be able to switch on/off
Should output power usage as sensor over ESPHome
My last buy was a fail because I did not see they do not support power measuring.
I just got a Blitzwolf SHP6 it’s a nice small plug that works with ESPHome and Tasmota.
It’s about 12 dollars for the EU variant on AliExpress or Banggood. But you can’t use it with more then 10A. If that is a problem they also have the SHP2 which can handle 16A, but the plug it self is a little less sleek.