Here you can find few kinds of highly detailed mushrooms, also included a lot of groups for ground and walls.
This package is a part of Fantasy plants bundle (save 50%)
Support, URP and HDRP shaders are here:
Textures size - 4086x4086
Triangles counts:
Mushroom groups 1F - 35000
Mushroom groups 2F - 33000
Mushroom groups 3F - 9000
Mushroom groups 4F - 13000
Mushroom groups 5F - 7000
Mushroom groups 1W - 30000
Mushroom groups 5W - 10000
Mushroom groups 6W - 11000
Single mushroom 1 - 2800
Single mushroom 2 - 3500
Single mushroom 3 - 1100
Single mushroom 4 - 1400
Single mushroom 5 - 1300
Single mushroom 6 - 1000