Recently, I made some UI that is exactly like the official UI that Roblox uses, but im really unsure if im allowed doing this since im copying the style of what most Roblox prompts look like, just in case I decide to put a tag that says This is not the official UI for Roblox this is a fake. My question is, Am I going to get ban from making my UI similar to Roblox prompt?
I don’t think it’s a problem unless you’re scamming players. Other than that, you should probably read the Roblox ToS as I can’t give a answer if it’s actually allowed.
You’re fine to use Roblox’s UI style for your own UIs. Developer Guis are incapable of rendering over CoreGuis so this isn’t particularly a problem. What’s more important is the context behind the item you’re making and if it can be misinterpreted as an official thing or not (e.g. misleading false purchase prompt), which then at that point it can be problematic even if you aren’t styling your Guis like CoreGuis.