Universal Control has taken a step closer to public release with the first iPadOS 15.4 and macOS Monterey 12.3 betas. Available to try now, Universal Control allows people to treat up to three devices as one, with file transfers, app windows, and synchronised input methods. Apple debuted Universal Control at WWDC 2021 in June, last year.
https://www.notebookcheck.net/Universal-Control-comes-to-life-in-iPadOS-15-4-and-macOS-Monterey-12-3-with-seamless-integration-across-iPads-and-Macs.596326.0.html