Yes there is one saying "initial_dvb_mode=DVBT2"
I have two of them and they are definitely bought in 2021, so should work. In OE2.0 images everything works fine, so it will be probably a diver/configuration problem on OE2.5. Normally while in operation the tuner status with a green marked letter signs that it's working fine. If in operation the Sundthek tuner works with an error message and the tuner letter is staying red. When I jump a few times from one DVBT2 channel to another then sometimes it could happen that the letter turns green and it will be possible to record, which is impossible while the letter is red. In the configuration tool both tuners are saying to be in DVBT2 mode.