Sign into YouTube but not all google apps

You can deactivate the acoount in your phone setting, all accounts shows there

 

You will need to go to the individual Google apps and sign out of them. Google uses some kind of custom account management for their apps.

 

Mine isn't that way. I'm signed into YouTube but not google maps. My account appears on maps when I search and it asks me if I want to sign in, but I'm not signed in.

 

I take a different angle to segregating my Google "stuff". I use both Fluid (paid version for separate cookies/caches) and Epichrome, depending on my needs. I created and use separate Epichrome apps for The Guardian (paid Supporter), YT Red, Vivo, Google Maps, two Gmail accounts, and Weather Underground (paid version). I like both solutions as the created web apps can take advantage of dGPU acceleration and maintain separate cookie/cache folders.

I like Epichrome for some of my preferred web apps because I can install Chrome Extensions (like uBlock Origin and Dark Reader).

I like Fluid for some solutions such as Instapaper as I find Webkit to work better than Blink for some web portals.