Parsec's controllers are not special and just work as if an ordinary xbox controller was plugged on the host computer via USB. Most emulators need you to configure the controllers in their settings, and some games require you to enable multiplayer somewhere, or configure it further. If the guest controllers do work on the website, it means Parsec is passing the controller correctly, and the rest is up to the game/emulator. Parsec only connects the controllers if guests press buttons on them Ask the people who are connected to press a lot of buttons, then check if it shows on the website.If Parsec settings > Approved apps is enabled, approve your internet browser there so that Parsec can send inputs.To check whether the problem is actually Parsec, instead of just the game, the person hosting the game needs to follow the instructions below. In some cases, Parsec will pass the controller as normal but the game won't use it. The host's controller drivers aren't working There are additional requirements for using Dualsense The gamepad setting is disabled on the host Parsec can't see the controller on the guest Parsec is passing the controller but the game won't use it
If people are trying to use the mouse and keyboard, refer to the article about issues with the mouse and keyboard instead. This article covers potential reasons and troubleshooting steps for when someone cannot use their controller to move on a game through Parsec.