You should forget about HEVC.
The ZeroW2 is basically an underclocked Pi3B with less RAM.
At launch of Pi3, HEVC software decoding was very bad, basically unusable. Eventually limited HEVC playback became possible, due to highly optimized decoder (some functions were hardware assisted).
These optimizations were discarded for Kodi 19. Therefore from LibreElec 10 onwards, Pi3 HEVC capability takes a permanent step backwards.
If you own an old Pi3B/+ you have the option to remain on LE9 if you want to keep the old HEVC capability. With Pi ZeroW 2 no such option exists, since LE9 does not support it.
If you want a small, cheap device for HEVC, forget about the Pi Zero W 2. Wait for the Pi4A, which will (presumably) have same hardware decoder as big brother.