Beside of open-source, this whole use-case should be built as an industry standard, not as a ammunition for an adjacent platform war.
With these few huge tech-companies, the industry has lost its natural "feature" that required competing players to work together and form an Alliance/SIG to make really big things happen.
Instead, the really big companies are happy to take the fruits from that time (Wi-Fi, Bluetooth, NFC,...) and build something proprietary on top instead of contributing back to it...
Open standards are still a very common thing. Google and Apple themselves cooperated in development of Matter... then failed to address the key-sharing issue that facilitates vendor lock-in on Matter... so yeah, uhh... never mind.
With these few huge tech-companies, the industry has lost its natural "feature" that required competing players to work together and form an Alliance/SIG to make really big things happen.
Instead, the really big companies are happy to take the fruits from that time (Wi-Fi, Bluetooth, NFC,...) and build something proprietary on top instead of contributing back to it...