How to register releases from a different GitHub branch?

I recently had some releases done on a different branch than master. Is it possible to register these or have the PlatformIO Registry system pick these up? I noticed that they aren’t in the list.

These are: v3.2.1 and v3.2.2 in PlatformIO Registry.

I just tried to register, but since the JSON contains the same information as the main release, save for the version, is my suspicion that these won’t actually be picked up correct?

I know Arduino uses the tags, but is it correct that PlatformIO doesn’t use them?