I previously used Everdo on an Intel Mac and had configured the Group by setting for the Someday/Maybe folder to group by project, which worked fine.
After upgrading to an Apple Silicon Mac (fresh install, no Time Machine/etc) and configuring Everdo I found the option to group by project is missing for the Someday/Maybe folder. It’s still there for Next, Waiting, and Focus, but Someday/Maybe only gives me the option Default now.
I could (and might) try copying over config files to restore this setting but even if that works this does still seem like a bug worth patching.
edit: Just pulled up a Windows system I have and observed the option is missing there as well so its not just a Mac bug. Checking the old Mac again I found that Default is the only option present to me for grouping in the Someday/Maybe folder as well, but the items in that folder are actually still grouped by project as I had set them to be some time before.