The one you have listed as a red-belted polypore looks a lot like the large polypores I've been finding lately. After a lot of searching on the internet (and bugging a few experts on iNaturalist and mushroomoberver.org haha), I'm pretty sure what I have found is Phellinus everhartii. Maybe you have too? Link to most recent observation: https://www.inaturalist.org/observations/72268937

The dark, cracked cap looks a lot like some kind of Phellinus species to me at least.