I believe the VX is firmware upgradeable, not sure about the SP though.
Regarding the issues with iPados 13, i’d be amazed if a fix wasn’t made available. Line6 now being under Yamaha’s wing, i’m sure if Yamaha liaised with Apple, that would maybe carry more vocal weight than solely Line6.
On my ipad pro usb c 3rd gen, the VX works with Bias FX and Bias Amp2, that is all that i need tbh. However, Mobile pod does not see it to unlock the full features. As Mobile pod is something I don’t use, it is not an issue, but I completely understand the frustration from those affected.
i think it’s just a case of sitting it out for a hopefully not too longer wait. Stay positive folks!