Any way I can use Sidecar, even hacky, without putting both devices on the same Apple ID? Id like to use the Sidecar feature sometimes, but I don't want to overtake her iPad with my ID and apps, etc. Seems like such a silly restriction. I agree, I'd love to have more options to use sidecar, my only safe bet right now is to use Duet App.
Step 6. When you're ready to stop using your iPad as a drawing tablet, it's as simple as closing the app on your iPad. Just like that, you're disconnected. If you want to reconnect, it's as simple as opening the app once again. It's very user-friendly, especially if you opt to establish a connection via WiFi.
If you’re a Mac user who found that MacOS Ventura 13.3 broke the functionality of Continuity features including Universal Control, Sidecar, Universal Clipboard, HandOff, and other Continuity capabilities, you should update to MacOS Ventura 13.3.1 (or later) as soon as possible to fix those problems.
For example, you can't just use it between two iPads. However, you can use Universal Control between Macs, with no iPads involved. Apart from the at-least-one-Mac caveat, there doesn't appear to be a limit to how many devices you can control using just the one keyboard and trackpad/mouse. Universal Control is limited to mouse/trackpad and If you're using a USB-C or TB3 Mac, you may as well get a portable USB-C monitor like this one I got two to run, one using SideCar and the other using DuetDisplaySidecar supports iMac 27” (Late 2015) or newer, MacBook Pro (2016) or newer, Mac mini (2018), Mac Pro (2019), MacBook Air (2018), [and] MacBook (Early 2016 or newer). Sidecar works both wirelessly and over a wired connection. Wired connections don’t require WiFi and support both Lightning and USB-C cables.