Angular - Session Timout: Access the idToken Expiration field

Currently devleoping an application with Angular and dotnet using the Okta angular SDK to handle authentication. Currently using:
this.idToken = await this.oktaAuth.getIdToken();
in my typescript files where I need access to the token.
As seen in the example app in order to get the idToken stored in the SPA’s local storage. I also need to access the “expiresAt” field of the JSON in local storage in order to handle application behavior after a session timeout. The oktaAuth object does not appear to have a function that allows access to that field. Does this functionality exist? If so how do I access it? If not, suggestions for how to go about implementing it into the module? Or alternatively a higher level function in the sdk that I can use to help handle the behavior after token expiration.