Not strictly true. The WT530 package on the marketplace still has issues with some 3rd party aircraft currently not supporting it, so if you want general compatibility it’s better to install the PMS 530, and uninstall the WT530 for now. PMS530 also still supports some features WT have removed because “not realistic”, like the wind indicator.
The WT530 will still be available but only in the aircraft that WT install it by default.
These units have been added to the following aircraft in AAU1:
• C172 Classic
• Cap 10
• DA-40 TDI
• DV-20
• L-39 (Athena, Blue Ice, Pipsqueak, Robin 1, Sarance)
• P-51D (Wee Willy, Lady B, Strega, Miss America)
• T-6 (Almost Perfect, Baby Boomer)
From https://forums.flightsimulator.com/t/aircraft-avionics-i-release-notes-1-30-12-0/572740