Give them a permanent place in the lineup, treating phones like every other very personal device meant for humans. Small, medium, and large.
If you do that, and give people time to see exactly why 5.42 screens are superior to 6.1"+ sizes, then I think the numbers will start to change from what we saw with the iPhone 12 mini and iPhone 13 mini, which were both launched when people were less on the go than in 100 years.