Skoda Fabia 2019 new flip key was successfully added by xhorse vvdi key tool plus and aftermarket key with hu162 blade via OBD.
original remote number 6vo but used 5go.
Fabia is vdo unlocked.
If you have NEC35xx locked type not possible via OBD.
Read immo data and eeprom without problem.
Prepare dealer key and learn key with vvdi key tool plus pad.
It leanr key but both remotes stop working. You have to use odis online to properly learn keys with remotes. There is an issue with component protection on comfort module.
Remote can vanish you just re learn again then ok swap order of which key you learn first. You may have similar with keyless Passat.