AirParrot might be a bit more popular than Samsung DeX. We know about 1 link to it since March 2021 and only 1 link to Samsung DeX. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Possibly! If you go to http://samsung.com/us/explore/dex/, you can still download the Dex Mac app. It didn't work on my Mac with S22, but people have been able to get it to work with S21 and older even after they dropped support. You'll need to connect a USB C cable from your tab S7+ to the Mac, as it doesn't support wireless. Source: almost 2 years ago
Check out Reflector from airsquirrels.com. I've used them off and on for years to cast my ipad to desktops (and then display to the projector.). Source: over 2 years ago
Duet Display - With Duet Display, you can transform your iPhone or iPad into a second display to expand the screen space of your PC or Mac system.
Airfoil - This software is from the Rogue Amoeba company, built to run on Mac and Windows platforms. It’s an audio-based software that allows the computers sound to play over a network device. Read more about Airfoil.
scrcpy - Display and control your Android device from your computer
AirPlay - AirPlay lets you stream music throughout your entire house — wirelessly.
Vysor - Vysor lets you view and control your Android on your computer.
AirServer - AirServer is a Mac and PC application that allows you to stream or mirror your Android device to your PC or Mac.