Registering and usage licensing are different things - even if the product is registered you still have to pay additionally to use these kind of marks on your packaging for various organisations and as often they aren’t global organisations it could mean doing it separately for each market which also means increasing your packaging costs.
another issue with some of these labels is that they are poorly regulated and often abused by brands so have little meaning to consumers. The Grüner Punkt (green dot) recycling symbol for example. Literally anyone can buy a license to use the mark on their packs but it in no way means these packs are recyclable or recycled. I’ve seen plenty pf brands I have worked with in the past abuse this one in particular.
Personally - I think these marks are only useful for brands if they operate in a market where they are either mandated legally or it would damage their sales if it wasn’t used - say for example if you were selling foods in an Islamic country where the majority of consumers would look for a Halal certification and choose an alternative product if they didn’t see it.