Synchronize GIT project to Team Services Online

Hello guys,
I have a local GitLab installed on Ubuntu 18.04, gitlab is on the latest version now.
My team wants to migrate / synchronize a project from git to TFS Online (VSTS) but the “issue” appears here, they want like all modification, update made in real time from local workstations to gitlab project like commits, pushes etc to automatically sync to VSTS like a trigger or I don’t know how to call it correctly…

Is this possible, if yes, what is the procedure, exists any documentation, how to’s, etc?