I grew up in the 1990’s era of rack-mounted effects - and they all had input and output volume controls.
Nowadays, almost any one of my pedals has more processing power than my entire 1999 rack – but ONLY my Polyend MESS provides simple “grab and turn” controls for input and output volumes.
I WISH OTHER MANUFACTURERS WOULD ADD THESE (Looking at you Meris and OBNE!).
Anyway, for those of us stacking pedals, the accumulation of gain is a perennial problem.