Thanks! That seemed to do the trick.
Just installed LibreELEC 10 on a RasPi 4 and the "Install from Repository / All repositories / Games add-ons / Emulators" option is missing. "Controller Profiles" and "Standalone Games" are there OK.
Does LibreELEC no longer support emulators, or is something maybe wrong with this install?
It's a plain install using the official tool, I have not added any extra repositories or done any configuration beyond locale.
I can't seem to find any documentation on steps I may have missed.
I've got LibreELEC 9.2.8 installed on a second microSD card and all seems good there with a vanilla install.