Workspaces? Don’t recall if it has its own icons

https://www.maketecheasier.com/how-to-work-with-workspaces-gnome/

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Have a look on xdaforums for your device, there will be guides. With the Samsung for example you have to enable bootloader flashing in existing rom developer options otherwise it will overwrite on a fresh boot. Gxda is a trove of info though

Have you tried Newpipe? Lovely YT client for android :)

Switch covers are the way I went, then you can still get to the switch if you should need to

Anydesk would be worth a look, and free for none commercial use