Can't find beta app in connectIQ store

You have to access beta apps from your developer dashboard, and they only show up for the developer account.  You can use the download button to select any device linked to the connect account associated with the developer.  Once you select download, it will install the next time the device syncs with Garmin Connect either through the mobile all or the desktop app.  Once it is installed through the developer dashboard, you should be able to see the FitContributor fields and settings just like a fully approved app.

Perfect, thank you.

The problem for me is that the web page doesn't always show the additional compatible device for me after uploading a new version where I added support for another model. I've opened the built iq file and the device is listed in the manifest. I often have to upload another version before it becomes available. There seems to be some caching or delay.

Once you update an app. it can take a couple hours to be checked and the update approved.

This is a beta app, which doesn't go through that process afaik. This cache / delay failure to update properly is something I've experienced several times and why my app has so many version updates just to get it to update.

Yeah, given that beta apps are typically available instantly after the initial upload, it wouldn't make sense for subsequent updates to be subject to any kind of delay / approval process