Managed to access office and of course find out macOS Big Sur 11.2 hates 4K usb-c external screen so been battling to get right screen resolution with laptop lid down. Why did I update I ask myself. Then I see 11.2.1 and now it works (Intel 16”MBP 2019 with Radeon pro 5500m 8GB)

Adam Procter @adamprocter