'Is there any federated identity mechanism to allow SPA to authenticate based on its domain?

I have a Single Page App (SPA) stored on gitHub. That SPA is suppose to display data that is stored on MS Dataverse. In order to retrieve that data I need to make a HTTP request to MS Dataverse but without user's authentication. Having into consideration that Dataverse doesn't allow HTTP requests from unauthenticated users, I'm wondering whether is it possible to authenticate my request based on my domain name or at last the DNS. I suppose for that to be possible, that some sort of azure identity federation is required. I'm sort of a newbie wrt the MS solutions, so I would be glad if someone would enlighten me about suitable approaches.

Thanks in advance & BR,

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'Is there any federated identity mechanism to allow SPA to authenticate based on its domain?

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