Some people (like myself) prefer booting into the flashed ROM first.
Then flash the patched boot.img, which in your case, I would highly recommend you do AFTER first-time boot in HOS.
after update (LISA) OS2.0.2.0.UKOCNXM to OS2.0.7.0.UKOCNXM via fastboot
1. can't connect wifi (failed to connect to network )and can't use mobile data (appear 5G symbol)
2. often system launcher keeps stopping
how to fix its
Update: everything went well with the upgrade. Well almost: Flashed OS and everything worked normally, until I patched boot.img with magisk, and flashed it back then touch stopped working and battery indicator was showing 0%. Flashed back the original one, tried patching again and it worked. I was already on latest Magisk v29 so no idea what happened there. But at now everything works like a swiss clock, battery life is similar to MIUI14 with the uperf+granubess uv running. Thanks you Xiaomi.eu devs and community