If it is a map, check file size. Maybe the author forgot to upload the actual map itself. Common rookie mistake.

If it is an item, check workshopconfig.ini
The file should have $OBJECT_VEHICLE <folder name> or $OBJECT_BUILDING <folder name> for the item to appear in-game.

Exit the game, exit steam. Then restart steam. That usually fixes the issue unless the item is bugged.

Linking it could help, the mod you subbed to.
If it is a vehicle, as an example, it might have date restrictions, depending on your game settings, before it shows in game.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2573140862

I've looked into the script & the workshop .ini's and still wont load
changed the dates, made a custom game with unlocked vehicles etc, no difference.

since this one seems bugged, and i was only using as a semi - template for my own articulated locomotive, is there any others that actually work?

Thanks