Very low Adsense earnings with Safari users since version 12.x.

Did someone find a working solution for the ITP problem on IOS devices?

Since the advancing versions of Apple's ITP (Intelligent Tracking Prevention) with the current ITP 2.3, Adsense revenues for ads in browser versions since Safari 12.x and 13.x have been significantly lower than those of Android browser versions.

My eCPM for Android browser versions is twice as high (approx. $25) as that of Apple browser versions from 12.x (approx. $12-15).

Older Safari browser versions that are not affected by the ITP also have more than twice the eCPM (e.g. v10.2 with $33).

See Google Analytics screenshot (dec, 2019). In Analytics go to Acquisition > All Traffic > Channels > then change "Primary Dimension" under "Other" to browserversion. Then choose Adsense tab (Adsense account linked is required). Before Apple introduced ITP, eCPMs for Apple browser user were always significantly higher than those on Android devices.

The interim solution to save cookies as local storage in order to circumvent the lifetime limitation is no longer possible.

Or does someone still have a local storage variant that also brings good eCPMs to Safari browser versions 12.x and higher? Does the "Cookie Saver" solution work for anyone?
Any exchange of experience is welcome. I run several websites, some with overlapping topics, which some think is a problem in Adsense. Have you tried any ITP solution?