If your app is not accepting orders, the most likely cause is that the app is logged on at a time that is not within your typical operating hours with Uber Eats.
Uber Eats Orders may also automatically pause incoming orders.
This can happen for two reasons:
For more on this, or to check if your currently paused, see the article Why orders pause automatically.
If you’re still experiencing issues with your iPad, you can access your Uber Eats Orders through merchants.ubereats.com/orders.