Press the zap button vs tap the button and it should be adjustable vs the chosen amounts.
Discussion
Should look just slightly different: 
Yep, figured it out 👍
You can adjust you zap amounts in settings as well 🧡🫂💜 #GrowNostr with #Damus
I’ve set the default to 100
We CANNOT let Damus ( nostr:npub1xtscya34g58tk0z605fvr788k263gsu6cy9x0mhnm87echrgufzsevkk5s ) go away… his announcement last night is heartbreaking. Long Live Damus!!!