There is a new pull request by the-antz against master on the void-packages repository

https://github.com/the-antz/void-packages master
https://github.com/void-linux/void-packages/pull/15969

thunderbird: add thunderbird-wayland start script.
Thunderbird equivalent for the firefox-wayland script in the firefox
package.

A patch file from https://github.com/void-linux/void-packages/pull/15969.patch is attached