Yes, this is possible since they share a database. This is exactly what I did for the THC Girls app but it’s actually broken down into 3 apps: 2 user-facing and 1 admin-facing app.
1 mobile app, 1 desktop pwa, and 1 desktop pwa for admins.
We use the admin PWA for all of the things that admins need, like managing users, processing orders, etc.