I have the same issue and it's very annoying since I'm using Interface to scan barcodes ...

Did we get the answer to this? Submitted several help requests to airtable--no response. My customers can't fill out any airtable forms on mobile. Miniextensions forms work OK, but what is going on with airtable forms????

No... it's very odd to remove an already-existing feature. We can only hope that AirTable will bring this feature back when they eventually support interfaces on mobile/tablets.

I just finished my first proper AirTable interface POC, in love with the tool. 
I would also appreciate this feature. 

use case : my application is a health passeport for my car (logging maintenance, fuel, arrangements) and I would like to be able to add rows to my “gas station stop” form on the run from my mobile.

All of Airtable’s forms work on mobile devices.

However, Airtable’s forms are very limited in their feature set, so if you’re looking for the ability to add new rows (i.e. add new linked records) to a form, you would either need to:

1. Use one of Airtable’s mobile-friendly interfaces within the Airtable mobile app, but that can be very difficult, slow, and cumbersome from a mobile device.
   
   or
    
2. Re-create your Airtable forms in Fillout’s advanced forms for Airtable.
   
   Fillout is 100% free and offers hundreds of features that Airtable’s native forms don’t offer, including the ability to create new linked records on a form, update Airtable records from a form, display Airtable lookup fields on forms, perform math or other live calculations on your forms, accept payments on forms, create multi-page forms with conditional paths, and so much more.

Hope this helps! If you’d like to hire the best Airtable consultant to help you with anything Airtable-related, please feel free to contact me through my website: Airtable consultant — ScottWorld