"Most try to funnel you into a vendor's sync passkey option" Therein lies the problem. Every vendor's profit motive and #enshittification means they want to ow

"Most try to funnel you into a vendor's sync passkey option" Therein lies the problem. Every vendor's profit motive and #enshittification means they want to own your passkey and all the personal data associated with it. None of the care to interop or work with decentralized solutions. They need your data, and they'll do everything they can to lock you into their jail.