1Password copies one’s OTP to their clipboard, yet Coda for iOS does not auto-paste it nor allow manual pasting of it, meaning that one has to manually leave the app, go into 1password, authenticate, search for coda, open coda, find the otp, remember the code, then open the coda app back up and type it one by one.
Coda is the only app I’ve used that doesn’t support pasting, and a fair others do the auto-paste thing anyway which is even better.