Remove the +180ml milk from oat so simple ?

Use the packaging information for as sold and create your own entry for it. I use the satchets as they are only 100 calories and I make it with water, chia seeds and summer fruits soaked overnight

You only need to work out the calorie count in how you eat the product once. You can then save it, in your food or meal list. Then it can simply be added directly from your list in future. Which is then as quick as scanning product.

Even scanning the product, eating it as suggested on the packet. Is not necessarily accurate, as the entries, even scanned bar code ones, are user generated and not always accurate. So I've often needed to create my own entries so they are accurate.