basically wanted to add an button to my loading screen which appears as the server is fully loaded, instead of the player automatically loading in, i’d like to add an button which as pressed, turns off the loading screen so the player can play
Here you can find how it works: Loading screens - Cfx.re Docs
You can set an option in the fxmanifest which tells the loading screen to stay indefinitely until you call a specific native.
You need to use deferrals and Adaptive Cards to achieve this.
But that would be before the loading screen even happens. OP wanted it when the loading screen is basically done. Similar to some “Press any key to continue” screens in some games.
Though I do need to look into those myself at some point for one of my projects 
