Using ‘default voice line’ for all outgoing calls

Hi, I am using dual sim in my phone. I would like to use the selected ‘default voice line’ sim for all outgoing calls. Currently each contact is using the ‘the last used’ sim setting (which is also buggy, but thats a different problem). I don’t want to use this ‘last used sim’ option. Changing the preferred sim for each and every contact one by one is not a realistic solution. Is there any option to say ‘use this sim for all outgoing calls’? This is such a simple option available in android phones. But I couldn’t find it in iOS.