Since I don't use git much these days, I'm going to speak in generalities. I would guess the assumption is that you can't have reactions without comments. So c

Since I don't use git much these days, I'm going to speak in generalities. I would guess the assumption is that you can't have reactions without comments. So comments v1 is "comments" and v2 is "reactions". They need to be different PRs, so I guess that's what leads to different branches. But they can be reviewed independently, you just have to merge one before the other.