I'm dealing with a GitLab Community Edition 13.10.1
.
At the moment there are about a hundred small projects on this.
By selecting a project it is possible to search for specific code within all its files, but if instead I go to the GitLab search and select "Any" project, the "Code" tab is no longer visible.
Is there a way to do a code search, but within all the existing existing projects?
You can use GitLab Advanced Search to search for code if you are subscribed to the premium tier.
Another option would be to use the opensource gitlab-search tool if you are using the community edition.