Is there a clean way to do this thing with code or plugin?
You will need to consult the documentation of the specific SSO integration you used as there is no general WordPress solution for your problem that does not involve code.
If code is an option, you could add a filter that checks the email and aborts with an error page instead, but you would need to construct the UI for the allowed/blocked lists yourself. There is also no guarantee that this won’t interfere with your SSO solution.
As for plugins, blacklist plugins exist, but recommendations are off topic here
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