How to make yogurt drink with oatmeal topping?

I’ve been loving yogurt drinks at stores like Hey Yogurt and Yomie’s Rice x Yogurt. I especially love the one with oatmeal topping. Unfortunately, the store closest to me is far, so I’d like to make my own at home. I haven’t been able to find much online about how to make it, just seeing a lot of overnight oats recipes and yogurt drink recipes with the oatmeal completely blended (I want the oatmeal pieces whole). Please leave some recipes/suggestions! TIA!