I want okta as a social login, where it should allow every okta user to login my site, even the user is from different organization. Currently, It is allowing only those users who are in my organization. I am using angular SPA.
This is not supported. An application created within Okta can only be accessed by users assigned to this application within the same Okta org. Users from external orgs will not be able to access it.
You will either need to make separate instances of your application for each additional Okta org or, if this is a more enterprise use case, configure the other orgs as external identity providers for the org in which the application exists (which will result in these users being added to your Okta org), as you can do with our Org2Org integration documented here.