Roblox usual gives a template which you can use to make your portfolio so it shouldn’t be that hard, providing past work is very important since people can get an understanding of your style and what you’re capable of.
I meant My Made Things Because i didnt do any UI Design Works For Others So i dont have But i know that i can Thatswhy i needed Some Ideas So i can put them in portfolio
Either work for free until you build up your portfolio or just search games from roblox and take ideas from their UIs, including your own creativity as well.