@altyr thanks for the information regarding nomadic identity, I now see what the problem is for this part.
I wonder what the issue is regarding cross-platform account migration, though...
@cwebber @Gargron @dansup I hope you won't mind me CCing you there but I think you're probably among the persons most likely to be able to answer this and I really could not find relevant information.
Please see
https://scicomm.xyz/@tfardet/106131492323136854 for the original question.