5s using Google search.
to download click on the green "code" field
https://github.com/CoderTyn/Magisk-Alpha
https://www.magiskmodule.com/download-magisk-alpha/
https://t.me/s/magiskalpha?q=app-release&before=659
It's been a while. Do a normal update (preferably using fastboot method) But personally, I would do a clean update.
Don't forget to create a backup before updating.
https://xiaomi.eu/community/threads/hyperos-2-0-stable-release.74372/post-737084
This forum is not for the official HyperOS. This forum is for the custom ROM (xiaomi.eu) created by a group of enthusiasts.
If you are using the official ROM, please submit your request on the official Xiaomi forum. Furthermore, your device is not supported here.
https://new.c.mi.com/global/