In order to get better clarity on what work is done, it's a good idea to connect your PBI's and tasks to the commits, branches and pull requests that relate to the item. All commits, branches and pull requests should be linked to a PBI.
Note: If you create your branches through Azure DevOps then you can link them during creation.
Here is a handy resource for linking work items:
https://devblogs.microsoft.com/devops/linking-work-items-to-git-branches-commits-and-pull-requests/
Note: You can setup Branch Policies on your main branches to enforce this behaviour.
