I used to use an app called Hullomail which brought them into an app as voice clips you can see the caller and play or export.
It also showed you missed calls while your phone was off since they can just flag when a call was redirected to them. Super useful.
IIRC they got acquired and removed the free tier but you might still find them useful.
I wouldn't be so sure on the last point. Saying it's the final release of Graphene feels like an empty threat