It depends on your client. Damus doesn't support that due to restrictions of iOS. Primal, Amethyst and other Android clients do.
Discussion
Using Damus on iOS device. Do I need another client? Orr another phone??? 🤣
#Primal bro 😎
As noted by nostr:npub1w4uswmv6lu9yel005l3qgheysmr7tk9uvwluddznju3nuxalevvs2d0jr5 and nostr:npub1xtscya34g58tk0z605fvr788k263gsu6cy9x0mhnm87echrgufzsevkk5s, you just need to enable zaps directly to posts by doing one extra step at https://zap.army/
we support it: https://zap.army
I stand corrected, ty!