Why kagi? Is there a better paid option?

I mentioned both. Google pay does not work in graphene. Google play works in graphene and has additional sand boxing implemented.

Yes- I’d recommend Graphene to anyone who can live without Google Pay. I’ve only been using it for a month but everything has worked without issue and with the added benefit of “storage scopes” and Google Play sand-boxing.

The web-based installer for GrapheneOS is very easy to use. The catch is that it only works for Pixel phones (and only those that are still receiving updates).

https://grapheneos.org/install/web