The following 2025122500 change mostly works:
restore support for bypassing carriers disallowing choosing the cellular network mode (this was lost in a recent major version migration such as the port to Android 16 QPR1 but we aren't sure exactly when it regressed)
It successfully restored the "Roaming" and "Preferred network type" UI options from my one SIM missing them. But it did not restore the "Wi-Fi Calling - Roaming Preference" UI option for that SIM even though it exists for the other two SIMs in the same phone (different providers). I don't recall if this ever worked for the first SIM, so I don't know if this was actually a regression from a previous release or a similar issue. In either case, it would be nice to resolve as a consistency thing.