well, it would be best to upgrade to 1.18 and use this one
https://community.home-assistant.io/t/danfoss-ally-1-18-set-external-temperature-to-radiator-covered-trv/380219
The new one requires to have firmware 1.18 and attribute Radiator Covered set to true.
It works much better with this attribute and is actually using external sensor temperature directly (not as average with internal sensor as with previous firmwares).