what about call recorder app?

It’s a ridiculous assertion to say that the main iOS user issue is lack of a call recorder. hardly anyone is clamoring for that.

And given apple’s privacy focus and the thicket of complicated laws surrounding call recording (that vary soemtimes from municipality to municipality depending one where you are in the world), there is no way Apple touches it with a ten foot pole.

Finally, random feature requests don’t seem like appropriate topics for an iOS12 beta developer forum.

Users can feedback via http://www.apple.com/feedback/ - Individuals using betas are free to use the Feedback Assistant; Devs can use the 'Report Bugs' link, below right.