As a Roblox Developer, it is currently impossible to create a custom confirm notification Gui using the method
StarterGui:SetCore(“PromptSendFriendRequest”, Player) as seen below. This design clashes with custom interfaces in games which have more colorful designs.
Friend Request confirm Gui
A solution to this design is to prompt friend requests similarly to a product purchase Gui (below) because it’s more neutral and maintains the same design across the platform, or add option to create a custom prompt Gui’s to use so you can maintain the same design as your custom interface.
Product Purchase Gui
This will benefit developers to create custom player lists so they can use custom designs across the entire game and doesn’t look copied and basic like other games using the default Gui designs.