I’m a beginner in sewing.
They look close to our waralee wrap pants: Waralee wrap pants | FreeSewing
So check those out. However your pattern doesn’t seem to have straps, I’m not sure how those small bits at the front are attached. Would need to figure that out.
My guess would be hook and bar or buttons on the inside. I’m sure there are other options, but those are the ones I’ve seen most commonly on waistband fastenings.
