Valheim+ on Nexus will let you tweak just about any number you want, including drop rates for rng ores. It also includes a lot of quality of life stuff. You'll need to customize the settings in a text file but it's pretty self-explanatory. It covers most of what you'd want.

I also recommend Farm Grid to make planting neater and faster.

Added: Hey Danson, you can use Valheim+ to make the game more grindy and more dangerous if that's what you want. Enjoy!