Did your change to minimum yield also boost mining?
If not, maybe MiningYield never applied anyways.

Oh actually it works for everything except mining yield, I wonder what could be messing with it

AFAIK, the full list of modifiers is something like:
Luck, Skill, Operation, Feeling, FiveBase (depending), ConsciousnessEfficiency, the thing you're harvesting, and RNG.

By default, tools only change how fast you go.
Any mods that change any of those things might have some impact, I'd guess.

Thanks for advice, switching minimum yield did indeed increase the value produced. However, it is strange still because I have Very lucky character with All skills maxed. For testing I think I used the workshop reincarnation Labour God. And he still gets bare minimum yield. of 1-2, everyone does.

Might you know is there something else which might be causing this, like tool efficiency or some other stat I am not familiar with?

You need to be lucky or skilled for it to really matter.

I haven't run into any issues myself, but you can always edit it yourself to make sure.
Can find the mod file at:
steamapps\workshop\content\955900\2367582296\Settings\Property\AtrosWorkProperty.xml

If you suspect it's being overwritten I'd suggest raising the minimum yields up to 10 that file, which should make it super easy to tell whether it's working.

The original file is at:
steamapps\common\AmazingCultivationSimulator\Settings\Property\WorkProperty.xml

Hey guys, it seems to not do anything for me I typically only get about 2 resources per gather. I checked for any other mods which might be modifying the yield but could not find any conflicts. Have any of you encountered this error before?

Default limit is 120%

What is default limit?