Mac Noob - DattoRMM

I posted this on the DattoRMM sub, but it does not appear to be an active sub.

I installed DattoRMM agent on an iMac. I can see the machine online. When I connect, I cannot see the whole screen or control much of anything. I'm a PC user trying to embrace the dark side.

What am I missing? When I connect, I can see the desktop, but nothing on it. I cannot click on any menu items and I am not in the finder. Was there an installation step that I missed? or a setting on the machine that I need to enable?

Full disclosure, this is my mother's computer and not a client's. She's quite elderly and often needs assistance.