FAB visibility is really poor unless you already have lots of backing / name already established (your asset quality won’t even matter…)
consider creating better thumbnails, but even then, just think of FAB as a place to host your plugins (like Gumroad) and you have to do the marketing (which sucks)
I’m shifting completely to work with Blender Add-ons where visibility is guaranteed for actual systems that solve problems. I have come to realize actual devs on FAB browsing for real systems are too far and between to generate sales. (dont know about environment assets though)
Also try posting on Unreal Engine subreddit although from my experience its a circle jerk of dopamine deprived kids 