I made a photo post on the forum once that describes perfectly how supportive my partner is and it is still valid.
https://forum.inaturalist.org/t/you-know-youre-seriously-into-inat-when/1992/1345
He will also send me photos of critters he encounters just because he knows it interests me… even if he is actually the one calling for me to remove any spider turning up in our house. In turn I accept his Warhammer hobby to be as present in our house as he needs/wants it to be.
You do not need to share every interest in life, but it helps so much to be happy for your partner to have a passionate interest and support it.