Santa369 Seedvault isn't reliable. Even if it says its backed everything up, it really hasn't. YMMV.
There are no 'all in one' alternatives as far as I have seen.
The best bet is to,
1, Use Seedvault.
2, Check every app for a back up option and use it.
3, Make physical notes of each app you have, and custom settings etc you may have.
4, Take photos of layouts, homescreens and system/app settings screens.
5, Take some deep breaths and be prepared for frustration.
So far, this is the only major reason I miss iOS since the otherwise excellent experience with GrapheneOS.