There is something Safari had over the past years. But I am sure it's limited in use cause its more for banks that send verification code for a transaction or maybe for Google or other sites that sending 2 factor auth codes via sms.
So in the screenshot below it's Orion that won't grab the digit I just received for 2 factor auth and I need to write it down.
Safari is grabbing that auth code and clicks ok to move on the authentication process almost in every site.
I hope that reminds something to someone.. I was using it daily when needed!