Server wont use mods

So im new to java edition minecraft and i wanted to start a server with some buddies so i went to apex hosting and paid 15$ for a 4gb ram server so i could add any mods i wanted to play, i set the jar file to forge 1.12.2 because that is the version for all my mods.i can play all my mods on single player fine but some dont work on my server, i have 7 mods on the server (tinkers construct, biomes o plenty, not enough items, immersive engineering, mantle, iron backpacks,and inventory tweaks), not enough items works and shows some of my other mods items but not all of the items and even when i do use biomes o plenty and put BIOMESOP into leveltype it still doesnt work. how can i fix this problem?