Notification to set on a window

My company is migrating from Slack to Zoom. Slack notification will appear depending on which window Slack is in. I'm using a laptop connected to a hub with two external monitors. So, moving Slack to any monitor, notification will appear there.

I have one of monitors checked as main display, and it seems Zoom Team Chat's notification will appear there regardless of which monitor the app is in. How do I go about changing this? I have my Focus Assist turned off, do I have to enable this?

I'm on Windows 10 Pro, Notifications & Actions do not have Zoom listed here.

Thanks!