It's one of those things that will never ever happen because we don't live in a perfect universe.
They also aren't very attractive from a software freedom standpoint. Why give up decades of work on open source GPU drivers and then be forced to use a vendor provided Linux distribution?
Intel ME and AMD PSP are not a valid threat if you're forced to run proprietary code that may be backdoored on your SBC anyway.
This might be your best bet.
https://www.96boards.org/product/hikey970/
You're going to have to work harder if you want to use IO pins, but it claims it comes with some.
> One 40-pin Low Speed (LS) expansion connector UART, SPI, I2S, I2C x2, GPIO x12
Does that really matter much? Probably not. But if you're looking for the equivalent of a modern phone SoC it's also definitely not that.