How to deal with issuer URL and encrypted saml assertion response in samlp connection

I have to make a connection with ADFS using SAML. I have the respective metadata with me. It has different signon and issuer URL. Also, the signing and encryption certificates are different.
In saml response, I am getting the EncryptedAssertion.

On Auth0 UI, signon URL, signout URL and signing certificate are the only fields available. I also checked the management api payload but it also doesn’t have the issuer url and a way to decrypt the assertions.

Any help will be appreciated.