definitely not turkey tail
they look a lot like reishi to me, tbh - definitely some kind of Ganoderma spp. but probably not the artist conk, and unless it’s hemlock I doubt it’s G. tsugae, and since G. lucidum is only in Asia it’s not that. There are like 16 different reishi species native to North America, so it’s one of those.
If the tree is a conifer, it’s possible it could be a reishi look-alike, the species complex Fomitopsis pinicola, but it doesn’t look like a conifer to me, so I still think it’s a reishi.
There are many, many shelf fungi, but not all of them are reishi look-alikes so I think this is probably just reishi, tbh.
I have a “security blanket” too, but it’s a pillow I was given as a small child.
I’ve also felt ashamed for sleeping with it, it feels like it makes me infantile or not grown up, so I put it in a closet for many years. The past year or two, though, I’ve realized the comfort is more important to me than feeling ashamed, so I sleep with the pillow every night, usually I hug the pillow and sleep with it against me. It’s one of the few such comforts, and nothing else comforts me like it - even other pillows or plushes I have tried.