As I couldn't find RN9Pro in the device list I used Xiaomi Redmi Note 8 Global and now also pass SaftyNet test. I also renamed Magisk and put every app that doesn't need root on the denylist.
But I still can't find Netflix in the PlayStore. Any ideas?
Yup, there is a Xiaomi and Redmi option, the Redmi one contains the RN9P.Search for Redmi, not Xiaomi. If you passed attestation, clear play store and play services cache and data and restart the phone.
I don't know why it's split like that, maybe because of Xiaomi's branding.