As it can be stated within the spell’s description, Hypnotic Pattern does place a charm within the affected creatures. You would not have gain on attacks towards incapacitated targets. And they however make preserving throws as usual. These are generally clarifications on how the incapacitated problem (PHB 290) will work https://patronhipnotico32985.bcbloggers.com/33760101/what-does-patron-hipnotico-mean