Ability to hook into RedirectToIdentityProvider event in OktaMvcOptions

I’m using the Okta AspNet middleware but need to be able to add some values to the state before the redirect to the identity provider occurs.

When using the standard OpenIdConnect middleware I can add a hook into the RedirectToIdentityProvider event and add the values to the state at that point but the RedirectToIdentityProvider is hidden away when using the OktaMvcOptions that is available in the Okta middleware.

Would it be possible to extend the middleware so that it is possible to hook into the RedirectToIdentityProvider event?

Thanks,
Simon