Thunderbird can also automatically select the reply from address based on the original to address but afaict only for addresses you have configured and not for whole catch-all domainst - I guess that is something the extension allowed?
Sometimes I wonder if Mozilla don't realize of what their extension API redesigns are costing the world or if their just don't care...
It used to be even more comfortable using the "virtual identity" extension its author gave up maintaining it after Thunderbird 68
https://www.absorb.it/virtual-id/