I created the issue here, because I couldn't select Bitbucket Cloud as project.

Bitbucket Cloud currently lacks a native way to retire inactive repositories without deleting them or moving them to another workspace (which is no option for us)

Please add support for archiving repositories in Bitbucket Cloud. Archiving would freeze a repo in a read-only state, hide it from active views/search by default, and clearly mark it as inactive while keeping the code, issues and metadata intact.