Disconnecting a device definitely from Universal Control

Hello,

I'm using universal control with two M1 Macbook Pro & and iPad Pro.

I like to share my keyboard and mouse with the two macbooks, however I don't want them to be shared with the iPad. And whenever I'm going to the side of my screen, my mouse always goes to my iPad and it's annoying and blocks me to use to on my other Macbook.

I haven't found an option to completely remove a device from universal control, is it an existing feature?

Are there workarounds?

My ideal setup would be to have mouse/keyboard shared between the two macbooks and the ipad available as an extended monitor for one of the two.

Thanks for your help