Github commits are not updating GitLab project files

Howdy friends,

Context: I’ve set up a repo on Github and added it to my Github Desktop (Windows). I’ve then added the repository to a project on GitLab, where I’m keeping track of project management, and where I am ultimately wanting to collaborate with colleagues.

Problem: When I push a commit from Github Desktop it updates my Github repo fine, but doesn’t update the GitLab project files.

What do I need to configure to connect Github and GitLab properly? Do I need to add an access token to Github Desktop?

Thanks for your time,