Pro tip: ST actually has a free tool called CubeMX that you can use to avoid the USB mistake. I've used a few H7 parts in the past and it's never been something we missed. I'm actually surprised people were surprised. USB high speed has very different voltage levels than full and low speed, and they're not ones digital chips often use, so it's very common to need an external PHY. Just like Ethernet.
My advice is to never shoot the board before you have all your IO planned out in the tool. That's saved us a bunch of times.
Also, give the U5 series a look? Hyperram, internal HS phy, and parallel display port.
Also also I'm pretty sure pis can put out parallel display on the 40 pin header. Maybe not 24 bit, though.