The dream! But as I understand it, it’s not planned at the moment. The effects and operation of the software may be more complicated to code on FS2020. P3D also has the advantage of having almost all current tankers and some historical ones!
Something cool would also be to have a flying fire company in a software like air hauler. That would allow to have a virtual career in this branch!
I have no idea what it takes to make that for the new MSFS, but that platform will probably be the future, so I guess developers will have to follow if they want to stay in business… I agree that it would be fun to have a tanker career!