Hi Uwe,
A new *WSJT-X Improved 3.1.0 260226* *(beta) *release with our new open- source FT2 code is ready for testing. I had actually planned to release a new 3.1 version in April, but I think it's best to do it now for the reasons we all know. Additional features may be added later.
Just to let you (and others) know about FT2 and ADIF specs:
https://groups.io/g/adifdev/message/11669
It probably gets added now as MFSK/MM2 to the ADIF standard...
vy73 de Florian DF2ET