"What you don't get, you don't get" does not apply to the just-released patched package. The #OpenSource freedom to do the work for someone else has paid off in the form of a just-released package:
https://github.com/Vitexus/ThunderbirdDailyDeb/releases/tag/136.0a1
#Mozzilla has recently come to terms with the fact that it started releasing its Nightly package for Debian, but it forgot about the postman jaxi, so this project still makes sense for some time

Ubuntu - nixCraft