My magic4 stuck at magic os 6.0.0.168

Seems that Honor has stopped pushing MagicOS7- version ROM Updates. You´d better seek ”Downgrade Install Pack”(It will remove all your data in your phone). According to the regulations here, I could not provide Downgrade pack for you, but you could try searching it out by yourself.
Or, you can just ask Honor Customer Support for help.

MagicUI6 / MagicOS7 is rather old. Hope this information helps you out.