The ROM was made for Redmi K30S Ultra, you can see that clearly on the boot logo. We didn't change the name to Redmi K30S Ultra, we just stopped changing the name to "Mi 10T", because it's not something we should be doing. In fact, when we changed "Redmi K20" to "Mi 9T", it broke Amazon Prime HD too.
So your options are abundant:
1. Contact Amazon Prime support and tell them that "Redmi K30S Ultra" exists and it's the same as "Mi 10T". They allowed HD on "Redmi K20", so why not "Redmi K30S Ultra"?
2. Stay on 21.4.28 or any older ROM you choose, where we still changed the model name to Mi 10T.
3. Use an official Global ROM, which is made for Mi 10T.
4. Make a simple Magisk module that changes the relevant props:
Code:
ro.product.brand=Xiaomi
ro.product.model=M2007J3SY
ro.product.name=apollo_global
ro.product.marketname=Mi 10T
ro.product.odm.brand=Xiaomi
ro.product.odm.model=M2007J3SY
ro.product.odm.name=apollo_global
ro.product.odm.marketname=Mi 10T
ro.product.vendor.brand=Xiaomi
ro.product.vendor.model=M2007J3SY
ro.product.vendor.name=apollo_global
ro.product.vendor.marketname=Mi 10T