Overleaf.com keyboard shortcuts?
Yes -- a list is now available here: https://www.overleaf.com/read/qykqfvmxdnjf
It'll be updated if more shortcuts are added.
You can also click on F1 in Overleaf, and it'll appear all shortcuts and commands available.
Note: Many shortcuts don't work properly in "Rich Text" mode. So, first, switch to "Source" mode.