Web NFC is a W3C draft, and should theoretically be available in Chrome on Android with Chrome Origin Trials (here is a demo). Unfortunately the trial for Web NFC was only running for Chrome 81 to 83 (although caniuse.com suggest differently).
Question: can anyone explain how to get Web NFC enabled on a newer version of Chrome?
As described at https://web.dev/nfc/#enabling-via-chrome:flags, to experiment with Web NFC on Android, enable the #experimental-web-platform-features flag in chrome://flags.