Eufy Indoor Cam can't integrate with other Eufy cams?

As I have several outdoorcams, IR detection, doorbell and so one I decided to buy an indoor 2k cam pan & tilt. This cam is showed seperate in the Eufy App and can’t be a part of other cams. Can I use this cam together with the others?

Unfortunately not

SUPER frustrated with this. I bought them just for this. And NOOOOOO…

Yes I also want the indoor ones to connect and be part of a unified system