Welcome to the Community, @flying.
Currently, the delayed charges feature isn't available in QuickBooks Online Mobile App.
In the meantime, I recommend sending your suggestions and feedback about this feature to our product developer. Here's how:
1. Select the Gear icon in the upper-right corner.
2. Click Feedback under Profile.
3. Share your feedback.
4. Click Next to submit.
You can always use this link to check the status of your request: QuickBooks Online Customer Feedback.
You can use this article as a guide if you need to keep track of your expenses and payments: Enter and manage bills and bill payments in QuickBooks Online.
If you have any additional questions with delayed charges in QuickBooks Online, feel free to visit us again. We're available 24/7.
