Also as you mention. You will need to move into the WKWebView moving forward.
Chris@Chris-Air iosDeviceRelease % grep -r "UIWebView" .
Binary file ./Pods/Google-Mobile-Ads-SDK/Frameworks/GoogleMobileAdsFramework-Current/GoogleMobileAds.framework/GoogleMobileAds matches
Hi Everyone,
Thank you for reaching out to us. I work with William and allow me to assist you with this.
The Google Mobile Ads Unity Plugin v5.1.0 is already built with Google Mobile Ads iOS SDK 7.58.0.
As of 7.55.0 version of the iOS SDK, UIWebView is no longer supported and all it's references have been removed. Using "grep -r "UIWebView" does not necessarily mean that an SDK is calling UIWebView. Some of the strings shown in the Google Mobile Ads SDK are part of log messages. We have tested app uploads using both 7.56.0 and 7.57.0 and did not get warnings about UIWebView usage.
That said, please double-check the other binaries in your app to verify whether they are using UIWebView. We recommend running multiple tests with a subset of your binaries (e.g. a test without any mediation adapter/SDKs binaries if you use mediation) to verify the offending binary.
Regards,
Mark Albios