React Native Firestore display user posts, how?

Question

firebase

Hello everyone, tell me guys, there is a chat between users - user = user.
How to display messages when entering the room, for example, there is Sasha and Misha, Sasha enters, his and Misha's messages are displayed, when Misha enters, Misha's and Sasha's messages are displayed, tell me how to do this.

Here is what I tried

firestore()
.collection('messages')
.where('user_id', '==', parseInt(data.user_id))
.where('to_uid', '==', parseInt(data.to_uid))
.get()

But this method only works for 1, but what about the second? If the work was with mysql, then it’s clear, there is a selection of two fields at once, comparison operators and everything is ok, but how is it here? I didn't find anything in the documentation about this. I'll be happy to help, thanks :)