If you don't see the drop-down menus, you should be asked if you want to use the wireless projection feature. You should be able to download and install the feature in no time. When you return to the System and Projecting to this PC page, you'll see the options we've mentioned above.
Search for and run the connect app on the laptop you want to connect to. You can focus on the desktop that you're going to be projecting from once that is done. To connect to a wireless display, you have to go to the settings. Pick your computer when it shows up in the list.
If you want to duplicate the two displays or extend them so you have more room, you can access all of the usual settings under System and Display. If you had an external monitor hooked up, you could drag Windows between the two screens. The second display on the secondary laptop can be turned into a full screen if you need it.
There is a desktop and a laptop.
You can use a wireless streaming protocol with macOS. It allows you to use a Mac or iPad as a second display, so you can use your computer as well. You can choose the wired or wireless solution that works best for you. There's a lot of options to choose from.
To make sure you have all the necessary technology built into the software, both Macs need to be running macOS Monterey or later. If that is the case, your two Apple computers need to be online and signed into the same Apple ID account, which we're assuming is the setup that you're most likely to have.