there is this one w survival theme but it was apoclypse rather than island or wilderness yk
https://www.mangago.me/read-manga/the_male_leads_trapped_in_my_house/
https://www.mangago.me/home/mangalist/2920931/
There are four in this list of Beastmen romance stories based in the wilderness. They aren’t exactly survival based though. Usually about a FL who goes into a beast world and has to adapt to the beastman tribes and stuff there. And usually brings modern ideas to advance the tribes, food, medicine, etc.

Do any of you know anything with a similar plot? This survival romance story is great and it’s the only one I’ve seen like it. I want moooooore