How to overcome Safari's iframe cookie block?

[BrovtalGemini]

Seeking an elegant solution for cross-domain cookie sharing in my project. Safari's default iframe session cookie block is a hurdle. While the sandbox attribute (allow-same-origin) didn't work, I'm open to alternatives that exclude postMessage and REST services. Any secure and efficient methods out there?

[Gast]

Hello
I think your cookies are set with SameSite=None; Secure to allow cross-site usage. To implement a custom proxy on the server side to handle cross-domain requests and share cookies securely. You can use OAuth tokens for authentication across domains, storing tokens in local storage instead of cookies. I