Using M.2 and SATA SSD together on the same motherboard is possible.
Using M.2 and SATA SSD together on the same motherboard is possible.
The guide doesn't mention shared bandwidth for ports. It notes that 7th generation Athlon CPUs can't use PCIe M.2 SSDs, but that's separate from port sharing. You could relocate the drive to another SATA port if needed.