I'm trying to test a mod I've made and published (adding a new type of ammunition, Brass Solid Rounds), but nothing from it is showing up in the Creative menu or a Workbench I spawned in. Thinking it might have been a mistake I made, I decided to download an existing mod and test that, but the same thing happens; the Mods folder might as well not exist. Help, please?
I have attached screenshots showing the Mods folder which has the mod installed and my attempted in-game testing, showing that the mod isn't registering.


I have attached screenshots showing the Mods folder which has the mod installed and my attempted in-game testing, showing that the mod isn't registering.

