Unfortunately, I have to hope this doesn't see widespread adoption. If this becomes the standard it will just add to already existing social pressure to get an iPhone in the US.
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Anyone can have an Apple Account whether or not they own an Apple Device.
In this case, too, you can create Invites on icloud.com on non-Apple devices. Including the webpage seems nicely responsive and can probably make them in an Android Chrome tab if you wanted.
The only remaining obstacle is that it isn't a free feature of an Apple Account, but requires an iCloud+ subscription. But that's useful for Apple Music and Apple TV+ and other products, too, many of which work just fine on non-Apple devices as well.