It's nice to see you back here in QuickBooks Community. I'll share information about the features of the QuickBooks Online mobile app.
The option to create or see the purchase orders or bills in the QuickBooks mobile android app is currently unavailable. This is only possible through a QBO Desktop app or accessing the account via a browser. I can see how additional options and functionality with the said features would be helpful for both you and your organization.
QuickBooks Online is constantly changing and evolving based largely on the suggestions and requests of users. I encourage you to submit feedback to our Product Development Team for review when determining features to be added in updates. This can be done directly through your account by clicking the Gear icon in the top right corner, then select Feedback.
I also suggest visiting our QuickBooks Blog to know about the latest news and updates from QuickBooks Online.