Transfers from Innovative Finance ISAs (IFISAs)

Back in June I asked if it were possible to transfer cash from an IFISA to Trading212 and I was told that it is not possible unfortunately. I’m still figuring out what I should do with my IFISA funds. It would be great if Trading212 supported partial ISA transfers of cash from IFISAs. I’m not aware of the bureaucracy involved but I don’t imagine it would be significantly different from transferring cash amounts from other ISAs.