Not accepting cookies in an iframe app in Safari?

Question

safari

In general, probably everyone knows the problem.
There is a safari (they also say opera), if you do not open the example.com site yourself, then the browser does not accept cookies in the iframe from example.com. This problem was described here on Habré , for a long time, and this was done for good intentions - so that people would not be followed without their knowledge.
As I understand it, all the hacks that could be fixed in safari and not one of the methods indicated in the article does not help. I also read on stackoverflow, everything is also “the old fashioned way”.
Is there now a way to fix this without resorting to storing the session in the URL or the window application page in a separate tab.
Thank you!
UPD:
Not kosher, but the following method works.
We open a new time window, set a cookie there and make a redirect, close the window.
UPD2:
Better way, but still not kosher.
Transfer the base frame to the page for fixing the safari, then transfer it back to the application page.
UPD3: Damn, what kind of assholes are minus, they would find it in karma and prescribe it to him.