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There's a web client. Non-apple devices can join calls but can't initiate them.

https://support.apple.com/en-us/HT212619

If you're on iOS/macOS, you can send someone a web link to join a FaceTime call with you. Not sure how the browser support is offhand. There's no client for anything else and others can't initiate calls.

I believe it's web based for cross platform. So equivalent to Google Meet and with similar UX limitations.

Everyone can initiate a call in Google Meet. Only Apple customers can initiate a call in FaceTime. So, they're not exactly equivalent.