For TOL Detergent Powders
Such as Persil, Tide, Ariel, etc... you don't really need extras such as stain remover powders. If anything just perhaps a bit extra detergent for badly stained loads. Using the normal profile wash/stain cycles of most washing machines sold in Europe plus TOL powders should take care of things 99.9% of the time.
OTOH using when using liquid, gels, or those pod packets, then yes, you are probably going to need some sort of stain removing "booster".
Neither liquid or gel detergents contain oxygen bleach if they have enzymes. Oxygen bleach plus perhaps a bleaching activator, enzymes, and a alkaline substance (usually washing soda) is mostly what you find in most boosters.
Persoally just add activated oxgyen bleach or sodium percarbonate to laundry when using liquids or gels which gives the same results. Don't need more enzymes as the detergents already contain a complex cocktail . In fact the only time one uses the various "booster" pods (Tide or Vanish) is when using any of the vintage laundry detergents in my stash that lack enzymes.