They’ve stuck it under its own app entry. Both K-9 and Thunderbird end at 8.2 for suggested releases.

I just installed Thunderbird, looks identical, just a rebrand. They’re so identical the import function is seamless mostly seamless.

Not sure if it’s a quirk of GrapheneOS or just the way things are now, but for gmail accounts, you’ll need to go in to something like Settings > Account > fetching mail > incoming server and then hit next.

This will dump you back in to the google web login auth page, so you can approve the app for each account.

Otherwise, the sync and alert settings are copied just fine, so it’s good enough.

Unless you run your own davmail server and connected to that instead, probably not.

I took out the garbage, FOR THE GLORY OF THE EMPIRE!