Can't schedule a Notebook pulled from a Repository?

Hey folks, I’m tinkering with a proof of concept that relies on scheduled runs of Notebooks every ~day. Was attempting to hook this project up to a GitHub repo so we could use GH for PRs and code reviews etc. but still run the actual workflows off scheduled Notebooks.

I successfully hooked up my GH repo as a Repository in my project, but it seems that Notebooks in my Repository don’t have a “schedule” option:

Note the “schedule” option available in the Notebook nested on the project itself (in green), and the lack of this option in the Notebook nested on the Repository (in pink).

Is there some fix here, or is scheduling a Notebook that’s pulled from an external repository just not supported?

(If this isn’t doable, next option is using Github Actions to upload materials to CloudBuild or similar, but the scheduled Notebook approach seemed easiest so thought I’d try that first.)