Fresh sweat has almost no smell. Odour happens when skin bacteria digest the proteins and lipids in sweat and release volatile compounds. Which bacteria dominate your underarm microbiome decides how strong that gets.
This is why blasting the zone with harsh antibacterial everything can backfire: you clear space for the stinkier species to take over.
Antiperspirant vs deodorant vs treatment
Antiperspirants block sweat ducts, usually with aluminium salts. Deodorants mask or neutralise smell. Treatment care, the category LITPITS plays in, works on the skin itself: healthier, smoother, balanced skin simply gives odour bacteria less to work with.
None of these are villains. But if your underarm skin is also dark, bumpy or irritated, a fragrance cloud was never going to fix that.
The honest take
You will still sweat. You are a mammal. The goal is skin that stays comfortable, looks even and recovers fast, so sweat is just water leaving your body instead of a confidence event.