Is BLE a PWA requirement? I think they explained their position pretty well here, regardless of whether I agree:
https://github.com/mozilla/standards-positions/issues/95#iss...
https://github.com/mozilla/standards-positions/issues/95#iss...
Their example of hijacking a BLE keyboard to get passwords seems a bit farcical. I would love to see a PoC of that attack. The API has been available in Chrome for quite a while. I don't think it has been a large attack vector.