Pete,
Wasn't really expecting a reply from you! I'll have to check the settings in the BIOS. Both Monitors do work, they just switch positions #1 (Laptop LCD) becomes #2 Monitor and #2 (External LCD) becomes #1 Monitor after a Reboot or a Shut Down & Start Up.
Asus Zenbook Q508UG-212.R7TBL 2-in-1 Laptop
AMD Ryzen 7 5700U Processor
8gb DDR4 RAM (Soldered on Motherboard)
1gb Western Digital Blue NVMe SSD
NVIDA MX450 (DDR6)
15.6" 1920 x 1080 (Full HD) Touchscreen
Intel(R) Dual Band Wireless - AC 7260
USB 1 x 2.0 - USB 1 x 3.0 - USB-C 1 x 3.1
Micro SD Card Reader
Lighted Keyboard
Webcam/Microphone
Windows 11 Professional
MS Office 365 Family
Logitech Anywhere MX Mouse