Allow Enable of ERG Mode in Non Workout rides

as per title , I know it can be toggled on / off during a workout mode , but i would like the option to be able to enable / disable in any ride

Main use case for me is when doing unstructured recovery ride - i just cant help myself and chase after randoms / or go hard on the hills !

Or maybe have a workout that is initally erg mode at say Level based on FTP and then allow you to adjust up and down.

(Edit : See suggestion here for workaround , Custom Workout at Z1/Z2 Can I enable ERG Mode on a "Just Ride" mode?)