How to authenticate two different angular apps on micro frontend architecture

I have two different angular apps registered with OKTA for authentication and we want to integrate these two apps as a custom web element in micro frontend architecture.How we can authenticate each micro app when load in the DOM with out redirecting to OKTA sign in page?

Are you planning to have one of them authenticate with Okta at some point? If you use the same issuer for both, logging into one should log you into the other.

We have different issuer for both the apps.We have one global navigation app where we handle the routes.if user click on app1 link it will load the app1 and authenticate the app by Okta with different different issuer.