Why wont my Lenovo laptop wake up?

ASUS Laptop Won't Wake from Sleep Mode

OS Name Microsoft Windows 10 Pro
Version 10.0.18363 Build 18363
System Manufacturer ASUSTeK COMPUTER INC.
System Model UX490UAR
System Type x64-based PC
SMBIOS Version 3.0

Problem: about 80% of the time, my laptop won't wake up from sleep mode via keyboard press or mouse move/click. I seem to be missing many common features in power plan too, even after fresh Windows 10 install.

Troubleshooting Steps:

1. Reinstalled Windows 10 [clean]
2. Updated all drivers
3. Replicated on multiple Windows 10 versions, updates
4. BIOS latest version
5. No USB devices attached, ever. Only USB-C power and bluetooth mouse
6. Disabled "fast startup" in control panel