Single Sign-On Across Multiple Domains by disabling third party cookies using Okta-Auth-Js

We have implement the SSO login across Multiple domains using * token.getWithoutPrompt. GetWithoutPrompt(okta+javascript) must have access to cookies on the Okta domain via an iFrame.

Since all the modern browsers (chrome, safari) have disabled third party cookies, Is there another way to achieve SSO login and token renewal even when third party cookies are disabled.

Went through the Okta Custom domain suggestions, it may work for SPA or single domain, but our case its multiple domains. eg: Application1 is a plugin that can be plugged into any apps with different domains(Jira plugin)

@andreaskouras - Can you please provide suggestions for the above question. Looking forward for your reply.