If you go look at how pros train outside this is basically it.
You are going to lose out a bit depending on the workout (like if it’s 4x20 with very short breaks and you end up doing 3x20, long break then the final 20) but if that’s the case I would just do 1x60 and then the final 20 for however long that final climb was, of course keeping RPE in check with the workout.