Can anyone help me identify if this is a plant or is it some type of fungus growing.
How to Grow Cockscomb Learning how to grow cockscomb is an interesting garden chore and can brighten the flower bed with shades of golden yellow, traditional red, peach and purple. Both specimens offer long-lasting flowers for brilliant colors in the garden. They are heat loving and are somewhat drought tolerant. Full sun locations allow cockscomb Celosia to grow taller. But cockscomb may grow in only partial sun, so it can happily exist when partially shaded by taller plants. Pinching back the first bloom on these flowers can cause branching and a more abundant display of flowers on each cockscomb plant. Plant seedlings into rich, well draining soil that has warmed in late spring. Seedlings may be grown indoors or purchased. Those living in warm areas may sow the tiny seeds directly into the flower bed. In areas farther north, make sure the soil has warmed before planting, as letting the cockscomb plant get a chill can cause summer flowering to cease or not happen. Leaving seedlings too long in crowded cell packs may have the same result.
Read more at Gardening Know How: Growing Cockscomb Flower In The Garden https://www.gardeningknowhow.com/ornamental/flowers/cockscomb/growing-cockscomb-flowers.htm
that is most definitely a fungi/mushroom of some variety. It almost looks like a shaggy mane. I wouldn't see any harm in leaving it there, seeing as mushrooms are great composter's of any organic material in your soil. It is also an indicator of minimal sunlight exposure since almost no type of fungi likes sunlight.