totally fine to have mushrooms growing in the soil, most of the time they form a symbiotic relationship with the root system which means the plant can absorb more. Next time try inoculating with magic mushrooms and have even more fun check out
@budofpray 's past diaries he accidentally had that happen which was quite funny at the time. same goes for moss by the way : totally fine to see moss or green growth on the top of your soil. Hope this helps ! đ