I know how important this feature is for business owners that are always on the go like you, Noifsnobutts.
For now, we can only create purchase orders through the QBO desktop app and browsers (mobile and desktop). My colleagues have already submitted requests for it to be added to the mobile app. We'll let you know once the feature is rolled out.
You might also want to check out this comparison article for the available mobile app features.
Let us know if you have other questions.
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