Yeah agree. OP could find local foodies on Instagram and tik tok who like to try new things. I even think someone who is doing it as a hobby is maybe even better to work with than someone with a big following.
Invite them to drop in to film their content and offer them free drinks for their content day.
Yeah, part of being in a franchise is that you get access to an approved supply chain. So your ingredients are kinda locked and they tend to have legal agreements for maintaining consistency across all their franchise locations. Maybe some are open to regionalized items though…