Great response, thank you! I think some of those features are pretty valuable (like the other protocols, and the connection logging).
Bruno does allow git collaboration, but all that really means is that its internal markup language (bru, https://www.usebruno.com/bru) is human-readable (and thus diff-able). If your internal save files are similar, they could also be synced in git.
Unfortunately, my application is designed to persist binary requests and responses, so the file format is also binary. Encoding it to a text format is not ideal as it would increase the file size drastically. This is a big barrier and I do not have a concrete direction yet to make collaboration possible in a transparent and easy way.