m0useanswered grow question 3y ago common houseplant mushroom. Leucocoprinus birnbaumii - most likely.
Feeds on dead organic matter in the soil. this could be peat, coir, wood or anything alike.
Not Harmful to the plant, just means its nice and moist. Don't eat them. you can not get rid of them, the yellow bits your seeing is the fruiting body of the mushroom but the mycelium"its main body" is everywhere in the soil. Can only kill it with heat after your done, and sterilize the medium. I would pluck them to prevent more spores from being released and going into other plants,
It fruits when it gets lots of moisture and FAE or fresh air exchange. its one of the triggers to make fruit "mushrooms".
Good Luck!