Generally, but there are exceptions. I have a die set where the decapping pin is in the expander die. Have seen a few others like that, not many and usually older dies (like 50s or before, but not always).
Lyman uses "code letters", FL for the sizer (full length) the expander die body is M-1 (all calibers) and the expander stem has the caliber size marking, and the seater dies say DA (stands for Dual Action, seating and crimping)
RCBS sizer die body says sizer, the expander says nothing, and the seater says "seat". and the sizer and expander die also have the year of manufacture (last 2 digits) My dies are from the 70s, 80s. and some newer.
Don't know what other brands do, or did, sorry.
Some reloading manuals have a chart that cross references different makers shell holder numbers, but I don't know of any chart that does that for die markings.