Available app.* properties for access token claim

Hi Guys,

Been trying to figure out what app properties is available to add to claims to enrich the credential auth tokens or if it is possible to add custom properties or expose properties via the profile editor?

any advice on understanding this would be awesome

example:
app.appName
app.apiGrants

if I try to find this out by adding a claim returning app, the token preview fails

I have only been able to add hardcoded strings, but want to add app specific values for client api Apps

regards