Some structures do not generate on BDS since Minecraft 1.20 update (1.20.0.01 on BDS). On my server, this has affected trail ruins and ocean ruins, and other structures too (I believe).

Easy to replicate: Load the same seed offline and on a BDS after updating to 1.20. Travel to the nearest trail ruin or ocean ruin. Offline, the structure will generate as expected. On the BDS, it won't.

Edit: Attached screenshot of the console while exploring fresh world on BDS. Console shows the following error:
"[2023-06-20 15:51:32:845 ERROR] [Structure] Couldn't find a start anchor named "minecraft:road_anchor" in the structure pool element to place at Pos(-304,0,-864)."

This specific test was on seed 1737625029 the error appeared multiple times during journey from world spawn to x -304 z -864 where a Trail Ruins structure should spawn. On BDS, structure fails to generate. Offline, structure appears as normal.