Unable to listen to the 'beforeinstallprompt' event in PWA mode

[carvenl]

The beforeinstallprompt event is triggered before the installation of a PWA program.
The beforeinstallprompt event listener is written in App.vue as follows:

window.addEventListener('beforeinstallprompt', async (event) => {
    console.log('beforeinstallprompt')
})

After running quasar dev, this event can be listened to.
However, if you run quasar dev -m pwa to start in PWA mode, this event cannot be listened to.
What could be the reason for this? How should one listen to the beforeinstallprompt event and manually trigger installation in PWA mode?
Thanks.