I need to contact uber

Nice to meet you, *****!
Are you a driver or customer?

I would suggest following this link to report the missing item to Uber:
https://help.uber.com/riders/article/select-trip?nodeId=53539bde-f6f4-4909-85de-fa0b99f82be0
You'll need to make sure you're logged into the same account you requested the ride during which the item was lost. Select that ride from the list, then click Next and select what type item was lost, as well as fill out any additional information such as the best phone number you can be reached at and submit the form.
Depending on when exactly the item was lost, you either will be able contact the driver directly via the "Call" button, or you'll have to select the Contact Us button and leave a phone number for the Uber representative to call you back and put you in touch with the driver.
The other way:

1. Open the Uber app and log into your account, if prompted
2. Select “Activity" from the menu at the bottom of the screen and then the trip during which you lost the item.
3. Tap “Find lost item” and then “Contact driver about a lost item”.
4. Enter your phone number to call the driver.

I'll check
Sorry only from the App or via form I sent
Do you have any additional questions I can help you with?