Different app views and apps on different desktops
I would like to have set up on one desktop a browser showing webpage A, an FTP client app, and a specific email message. This is so I will be all set up to discuss and issue with my ISP when they call.
Desktop would be my normal desktop where I do the rest of my stuff.
Using Mission Control, I set up desktop 1. But when I toggle to desktop 2 and then start using, say Mail, I get the Mail view from desktop 1. Ok I can change it and carry on using Mail but when the call comes in and I toggle back to desktop 1, I see that I have lost my 'view' of Mail.
In other words, I want to be able to toggle between two desktops...the same app in both desktops but with different views. Is there anyway I can do this, please?
I'm on Catalina but could migrate up to a later version but would prefer not to.
iMac 27″, macOS 10.15