developer left out lesser known model of Fenix6s in compatible devices, can I sideload somehow?

Not quite sure where to ask this question but developers would know, Garmin feel free to move the question otherwise

the alphaHRV developer is not responding to queries so I am trying to find a way to get that app onto my Fenix6s standard which is lesser known than the pro model and somehow got left off the list even though it's the same hardware

https://apps.garmin.com/apps/1a69b10a-1d31-4afe-a32f-6a579ae20d9f

So Garmin doesn't offer my watch to install

Can I download the prg somehow and sideload it onto my Fenix6s via usb?

You can see all the Fenix5 and Fenix6 models are listed, it's just an oversight