Unlike DRAM, which is quite universal, most manufacturers of motherboards specialise in a specific direction. Asus, MSI, etc., hell, most of the consumer market players, have specialised in gaming oriented motherboards.

Do you know what a server motherboard doesn't need?

• 4 different RGB headers
• various gamer crap baked into the motherboard
• gamer branding all over the place

what they need is:

• specially formatted motherboards with built in IPMI or similar remote management systems
• dual CPU sockets in most cases
• tons of PCIe lanes available for interconnect fabric, GPUs, and so on

the two markets simply don't mesh. Asus losing 25-30% of its market practically overnight because people can't afford to buy RAM, SSD, etc. does not negate the fact they need sales to survive, so what they'll do is drop prices, lowering their profit margin, just so they're not sitting on unsellable stock.