Daisy Duck is part of the Mickey & Friends group in Disney Dreamlight Valley and is unlocked differently than the rest of the group. She is not in a Realm, so you have to find her a different way, which can be tricky if you don't know where to look.
You have an email guide How to unlock Daisy Duck and Boutique Disney Dreamlight Valley
Unlocking Daisy Duck is crucial if you want to gain access to all of her special friendship rewards and the interactive Boutique building. There’s a lot to do once you’ve recruited her as a friend in the valley, so here’s how to unlock Daisy Duck in Disney Dreamlight Valley.
To unlock Daisy Duck, you must complete Mickey Mouse's You Have Mail! mission and decorate her house.
Unlike most other characters who aren't tied to a Realm, there are no special quests or secret quests to unlock her. Instead, the process is pretty straightforward once you realize you need to work on this quest.
