How about a custom-made bee house? There are many artisans who specialize in creating unique, charming bee houses. You can commission a bee house that is tailored to your friend's preferences and aesthetic, with plenty of room for the bees to thrive. You could also include a guide or book on beekeeping, or a gift certificate for a beekeeping or bee house building class. This thoughtful gift shows that you not only know and appreciate your friend's interests, but that you also support and encourage their passion.
Or you can get her/him a star map with the date of the wedding.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.