https://www.telerik.com/fiddler/add-ons
It sasy for "neXpert Performance Report Generator":
"iOS devices and Android devices may not work with the default HTTPS interception certificates used by Fiddler. To resolve this incompatibility, you may install a Certificate Generating plugin that generates interception certificates compatible with those platforms."
While it says that on the "CertMaker for iOS and Android" too, which looks appropriate.