Session Issue With Safari

Wappler Version : 4.9.1
Operating System : W10
Server Model: NodeJS

I am using a Wappler website as an embeddable widget using iFrame.
When the iframe is launched, I save some values in session using the server side data Server Action.
Then, on the page, various server connects call server actions which use those session values.

This works find in Chromium browsers. But in Safari (macOS & iOS), its does not work most of the time.
I put in some logs to identify that even though I sam saving Session values in the server side SA, they are not being actually stored.

The website where this iFrame is loaded is on a different domain than the widget website.
Please help.