However the monolith does many things. It may serve frontend and backend. Maybe even some AI, or the scripts of the colleague from finance.
So how did you name your monolith?
I often settle for company name + platform.
Spending any more than 5 seconds on naming your core system is a waste of time/energy. If it ever needs a distinct name, it can be renamed. But that only ever happens in very complex operations, and even then it's rare.