So I was trying to change the BubbleChatSettings, but it is not working. The script is a local script inside of StarterPlayerScripts.
Code
local Chat = game:GetService("Chat")
Chat.BubbleChatEnabled = true
local bubbleChatSettigs = {
BackgroundColor = Color3.fromRGB(104, 104, 104),
TextSize = 20,
Font = Enum.Font.Antique,
BubbleDuration = 7
}
Chat:SetBubbleChatSettings(bubbleChatSettigs)