For anyone who facing the issue external display not working as usual via usb-c after upgrade to Monterey, for my case... M1 max 16" macOS version 12.1 Dell Display U3219Q I've found WORKaround on Reddit : https://www.reddit.com/r/macsysadmin/comments/qgypzy/comment/hpjdnn9/?utm_source=share&utm_medium=web2x&context=3

For anyone who facing the issue external display not working as usual via usb-c after upgrade to Monterey, for my case... M1 max 16" macOS version 12.1 Dell Display U3219Q I've found WORKaround on Reddit : https://www.reddit.com/r/macsysadmin/comments/qgypzy/comment/hpjdnn9/?utm_source=share&utm_medium=web2x&context=3

For anyone who facing the issue external display not working as usual via usb-c after upgrade to Monterey, for my case... M1 max 16" macOS version 12.1 Dell Display U3219Q I've found WORKaround on Reddit : https://www.reddit.com/r/macsysadmin/comments/qgypzy/comment/hpjdnn9/?utm_source=share&utm_medium=web2x&context=3