Automatically import projects on Helm deployed Gitlab instance

Hello everyone.
I don’t know if what I want to achieve is doable, but let’s try ! I have a gitlab instance that I succesfully deployed with Helm chart. When the instance has just been deployed, and you connect to it, no project is visible (apart from a Monitoring project which, if I understood correctly, is obsolete). My goal is that after the deployment of GitLab, a certain number of projects, coming from another GitLab instance, on which I do not have control, are automatically forked. Is it possible to do this via the chart? Via a kubectl command? Or should I automatically do this manually?
Thanks for your time.