Peplink seems to be one of the few edge routers that cannot accommodate the Starlink app workaround. When NOT using the included Starlink wireless router, in order to be able to use the mobile app, you need the ability to route 192.168.100.1/32 or 192.168.100.0/24 to the WAN interface but not to the next hop necessarily. I tried all suggestions and tinkered for hours and could not get it to work. I believe a limitation in the routing code will need to be tweaked to allow this.
I imagine Peplink would be a pretty common choice coming up for people in Starlink beta, but not being able to use the app to see statistics is a killer.
Here is a discussion on it: https://www.reddit.com/r/Starlink/comments/jxkz1q/anyone_know_how_to_get_the_starlink_app_to_work/
and here is a Peplink forum discussion on: Starlink and Peplink Balance - #9 by darwinperrier