Simultaneous Scrolling?

I am struggling with creating a group chat feature.

I have everything perfectly setup but for the chat replies, I ended up having to use 2 different RGs because they were referring to a single conversation, so it wouldn’t let me pull them up as a single RG.

So then I used the RGs to refer to each individual reply - one pulls the user’s profile photo and the other pulls the uer’s chat reply.

My question is pretty simple: how can I get these two RGs to scroll together and if I do, is there a way to take off the scroller on one of them?

Thanks ahead of time!

Ever figure this out?