Hi, please open SKYBOX on your PC and click SETTINGS to check the version number.
You can follow this FAQ(https://skybox.xyz/why-cant-i-search-for-devices-or-connect-to-my-pc-client) to turn off firewall, antivirus softwares and VPN to see if it helps.
If the problem still remains, we need to check your log files to troubleshoot. One log file is located in C:\Users<Your Username>\AppData\Roaming\SKYBOX\logs.
To find the other log file, please connect your Quest 2 to your PC through a cable, then the "Quest 2" folder will appear on your PC. Share with us the log files located in Quest 2\Android\data\xyz.skybox.player.ovr\files\Log. You can compress the folder into a zip and send it to email@example.com.
Besides, is you pc connected to WiFi as well?