onbeforeinstallprompt fails to fire

Question

I'm building a PWA and have the following hooked event

let isCompat = "onbeforeinstallprompt" in window,
isSamsung = /Samsung/i.test(_ua)
if (!window.matchMedia('(display-mode: fullscreen)').matches 
                && !window.matchMedia('(display-mode: standalone)').matches 
                && !screenfull.isFullscreen
           ) {
    console.log(isCompat, isSamsung, screenfull)
    if(isCompat) {
         window.addEventListener('beforeinstallprompt', (event) =>  {
                ...
                btn.addEventListener('click', () => {
                    let s = invite.prompt()
                    if(invite.userChoice) ...
                }, { once: true })
                event.preventDefault()
                invite = event
            })
     } else {
        if(isIDevice) {
            ....
        } else if(screenfull.isEnabled) {
            ...
        }
    }

The logic executes successful on latest chrome for android on a Samsung J5 1st generation. But not on the latest updated of Samsung Internet Browser 16.2.1.56 regardless of the fact that isCompat and isSamsung is true

My research so far shows that is should be firing so I am not sure why. Is there a shim that can be implemented to make it work on Samsung Internet?

an example and be viewed at https://622f59ba2b54ab2a844cf515--goofy-jackson-e12a89.netlify.app/