That's simply the nature of the smaller PCB dimensions. There are other ITX boards available. Asus has the even higher-end ROG Strix X670E-I, but the only things it brings to the table are two ...

The Asus ROG Strix X870-I Gaming ... Now that X870 supports PCIe 5.0 GPUs, X670E lacks any significant advantages that can be worked into the tight confines of a Mini-ITX motherboard.