I just found ChatAll and I have been using it on macOS and fell in love with it, it is so useful because IAs are not perfect (despite what Hollywood wants to believe lol) and having different answers from different services is so cool.
I just downloaded ChatGPT for Android and now Bing, but I would like one app to rule them all.
This is the closest thing at the moment. We don’t really currently have something that can connect in Bard and Bing with the others though.
Sad, maybe sometime.