This feature already exists, you build an Advanced Search and save it as a favorite. So what’s missing here is simply having this “button” available natively for everyone to click. I do believe the advanced search saved is a really decent workaround.
Looking for this solution as well. I need a way to quickly access tasks where I am a collaborator. I manage a team and am often added as a collaborator to my team’s tasks for visibility, but it actually doesn’t help visibility when I can’t find those tasks.
I’ve tried the advanced search workaround, but that also includes tasks that I am assigned to, and there’s no way to do “Assignee isn’t me”, so it just becomes an unwieldy list.