Although, FAO's Global consultation on agricultural extension (1990)recommended that governments of all nations should develop agricultural extension policy.
Yes, we do have a framework. it is still not converted into policy because this framework is still not approved by Our parliament for formulating policy.
We do have policies, but they have not kept pace with the changing times and methodologies. Do have a look at the Website of MANAGE (https://www.manage.gov.in/) who are the Apex institution for Agricultural Extension in India.