I disagree, at least on the Android side of things (Apple has long been hostile to PWAs). Installing a PWA from a website is trivially easy on Android, it's just that most users really have separated in their minds (not surprising due to history) that apps come from app stores, and the browser is used for websites.
Also, Google has made in much easier in recent years to submit plain PWAs to the Play Store: https://youtu.be/ddbHp8tGBwQ
Also, Google has made in much easier in recent years to submit plain PWAs to the Play Store: https://youtu.be/ddbHp8tGBwQ