Just in case anyone else is experiencing this issue, I've posted on Github. Please upvote or whatever (sorry, not exactly sure how all that works...)
Molly @ Mentions don't work on inner screen
This is considered a disposable / temporary email address service.
nunyo I'm using an slmail alias
Your account is limited until you verify it with a non-disposable email address. No one is going to see anything that you do in this context otherwise.
nunyo Perhaps I've been shadow banned?? Can you see issue request on your side?
Perhaps reading through the official documentation of said platform (GitHub) would be quicker than awaiting for a response from a busy developer of a project that's not related to GrapheneOS or GitHub policy's.
You cannot verify email addresses from disposable email address services (services that allow you to receive email at a temporary address that expires after a certain time).
akc3n I thought it was implied that I was tagging the developer to look into the issue with the application (as many others have done, successfully), and not with my GitHub problem. Forgive me for being a simple user and monetary contributor to open source projects and not understanding developer etiquette.