This mod adds:
A gold drop multiplier that you can change.

You can change the multiplier in this file:
Steam/steamapps/common/Noita/mods/More_Gold/config.lua

GoldMultiply = 1.5   ( Multiply the Money and the gold nuggets )

Install:
Steam/steamapps/common/Noita/mods/More_Gold...
GOG Galaxy/Games/Noita/mods/More_Gold...

If you are having trouble, test whether re-enabling the mod or reinstalling Noita will help.