Thunderbird 115 has been out over a week now and the lack of packaged versions, especially Flatpak, is beginning to raise eyebrows. Gotta admit, I’ve been curious at the lack of a Flatpak version since the day they announced it’s “availability”.
An article:
https://www.webpronews.com/thunderbird-leaves-linux-users-waiting-for-much-hyped-version-115/
Linux Cast episode:
It’s in the Snap Store as a release candidate. But sure if it will let you install it but Canonical seems to have it and be in the verification stage before releasing to stable.