Missing on website: how to actually do the requested steps (backup of original device and restore on /e/)

Summary

https://e.foundation/get-support/ says to start with step "1. Backup your data", but there are no instructions which app to use, etc.

What is the expected correct behavior?

Provide instructions that explain how to install a backup app (from f-droid?), and do the backup and later the restore on /e/.

There seem to be different parts to this:

• SMS/MMS/Call history: https://gitlab.e.foundation/e/apps/eDrive/issues/55
• App data: non-root backup app???
• Accounts?: https://gitlab.e.foundation/e/management/issues/338

Maybe also release the /e/ backup app to the pay store, to let it do the backup and find and recommend free replacement apps where possible?