There’s the ecloud …
https://doc.e.foundation/what-s-e#3-description-of-e-online-services-at-ecloudglobal
Can’t say much about it, though, as I don’t use it.
Seedvault is coming, but not here yet …
You can use TWRP on the Fairphone 3/3+, if you can live with the bootloader left open …
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