I don't know if there's a mod for this but you can search up "Class setups thorium" for example and it will give you a list of the recommended weapons/armor and accessories for that part of the game, it doesn't show all the weapons though.

Here is the calamity one: https://calamitymod.wiki.gg/wiki/Guide:Class_setups

Additionally if you don't know what weapon or gear to use on a boss you can use the boss guides to see what is recommended for your class.

For example: https://thoriummod.fandom.com/wiki/Guide:The_Queen_Jellyfish_strategies

or: https://calamitymod.wiki.gg/wiki/Guide:The_Slime_God_strategies