Even if they are on the same service, data will be inaccurate. Aggregating data, down to the device level, from two monitors is far more challenging than it might sound. Straightforward account switching would be somewhat easier to implement, and if you’re interested in that, I’d suggest ‘liking’ this thread to show your interest: 2 Senses on 1 Account or Account Switching
Our recent 400A integration solved this issue for a lot of people (who had multiple monitors on the same service). However, it doesn’t work in all cases — if middle port is in use or if the panels are greater than 80’ apart (as I noted yours are from your other post).