I've seen a trend in popular open source hobby electronics projects in the last year developing progressive web apps to replace their native apps, enabled by the addition of WebSerial in Chrome/Firefox. For example, ESC-Configurator in the drone world and ESPHome and Tasmota in the home automation world. Arduino even has a web IDE that you can program your Arduino from now.

For some reason though, Google decided WebSerial was too insecure for Android and disabled it, and Apple never implemented it in Safari. WebBluetooth is a thing as well but I think Bluetooth is too much of a pain, I haven't seen anyone use it yet.