Use iPad as a second display - Apple Support

You no longer need an M1 iPad to use Stage Manager but don't expect external display support

Best App for Using Your iPad as a Second Monitor or External Display

Get tips on iPad - Apple Support

macOS User Guide - Apple Support

Access features from the iPad Lock Screen – Apple Support (MY)

View photos and videos in Photos on iPad - Apple Support

Connect a display to Mac mini - Apple Support

Use iPad as an External Monitor with Air Display Free

Dual Display: How to Use Your iPad as a Second Monitor on Any Computer

Use your iPad as a second display for your Mac with Sidecar

Dual Display: How to Use Your iPad as a Second Monitor on Any Computer

Mac Owners: Use Your iPad as a Second Monitor for Your Computer - CNET