FYI, after emailed Zwift support team,
I interpret that reply as “those devices without Google Mobile Services-GMS/Google Play Store, won’t be supported anymore”
There is NO coming a fix, it even not a bug, they just changed remote login config, denied Companion login without GMS
Salute to ZW
https://support.zwift.com/en_us/supported-devices-to-run-zwift-H1Cj9QbeB