This is a paid asset, but now you can download Waiting Room Pro Addons for FREE, Please keep in mind this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
[MFPS] Waiting Room Pro Addons v1.1.1
“If possible, please buy the package to support the developer”
This add-on adds more features to extend and improve the Waiting Room feature that comes by default in MFPS. This include:
• Change Team
• Change Match Properties (Game Mode, Time, Bots, etc…)
• Add Joined players as friends
The integration just requires one click.