You guys obviously missed the 2020 WWDC presentation of “App Clips”..lol. Scanning a QR code launches a partial app for its immediate use. Here’s an excerpt from Apple’s developers page:
Introducing App Clips
App Clips are a great way for users to quickly access and experience what your app has to offer. An App Clip is a small part of your app that’s discoverable at the moment it’s needed. App Clips are fast and lightweight so a user can open them quickly. Whether they're ordering take-out from a restaurant, renting a scooter, or setting up a new connected appliance for the first time, users will be able to start and finish an experience from your app in seconds. And when they’re done, you can offer the opportunity to download your full app from the App Store.