Google Analytics / Firebase App+Web Integration

Hi there,
My company just started using Google Firebase to track KPIs on our mobile apps (Droid and iOS). Google Analytics has a new GA property for our App+Web integration, however Stitch does not show this new GA property when we try to add a new integration. We’ve added additional properties to GA that don’t run through Firebase and they show up in the Stitch UI, but the Firebase App+Web integration does not. Has anyone else run into this problem and know a fix? Does a Stitch representative have a timeline for when the App+Web integrations will be added?