I I have looked up several types of fungus and lichen and I'm not seeing anything that looks like this. I have seen others before that are light brown and rubbery looking
SOLVED: Is this a type of fungus?
There are so many kinds of fungus. It reminds me of a 'cup fungus' because of the shape. Though there are so many of those too, so hard to narrow it down. Plus they could look so different depending on the stage.
My best guess but I know so little about fungus.
It could also be a moss or something similar to that. Hhhmmm.....