SAML SAP IOS authentication

Hi we have a sap system which is configured with SAML, We are able to access the odata services by logging into okta through browser which then generates a session cookie to access the odata services, Now we are planning to have a mobile app to access the odata services, Through mobile I am able to get the session token access token and id token through ios okta sdk. Now to access the odata service should we enable oauth support to the sap? if we do so can we access it using SAML also like the way we are doing now. I am very new to SAP I am unable to find out a way to access the odata services through mobile app as mobile app gives an access token. Please help me out in this