[Unity UI] Unable to open submenu from right clicking on ActionMaps element in inputactions file

My Editor version is Unity 2022.3.50f1.

I am following along this tutorial https://www.youtube.com/watch?v=gPPGnpV1Y1c and at the 11:18 mark, he right clicks on “UI” under Action Maps in an inputactions file to bring up a submenu.

However when I do it, the submenu doesn’t appear at all. I tried to copy “UI” using ctrl-c and paste it in another inputactions file using ctrl-v, but it doesn’t work at all. It will work under the same inputactions file, but not if I want to transfer it to another inputactions file.

Is there a way for me to enable the submenus? Or is this a bug? Or must I download some other version of Unity?