It should be one of the icons at the bottom of a note,

It’s been a while since I used Damus but I think if you long hold the “ or there is a box with arrows I think…then it gives you the option to quote or just repost

nostr:npub1xtscya34g58tk0z605fvr788k263gsu6cy9x0mhnm87echrgufzsevkk5s how do you reNote and QuoteNote on Damus?

#asknostr