OS: Windows 11 Pro 25H2
Build: 26200.9168
Architecture: x64

Minimal probe:

Unpackaged:
CoInitializeEx = S_OK
CoCreateInstance = S_OK
ITfInputProcessorProfiles::Register = S_OK

Packaged MSIX:
CoInitializeEx = S_OK
CoCreateInstance = S_OK
ITfInputProcessorProfiles::Register = 0x80004005

Myanglish packaged test:
ITfInputProcessorProfileMgr::RegisterProfile = 0x80004005

Package:
MAUNGKAUNG.TsfMinimalProbe_1.0.0.0_x64__3exj47kn9m28y
SignatureKind: Developer
Status: Ok