We should give one simple request body without instruments array first as most merchants would not use it.
we can talk about the specific use case and add a separate sample request with instruments array and possible combinations. We should talk about the combinations that can used as well for ex -
if you want to check eligibility only on cardless emi method pass method as cardless emi
if you want to check eligibility on hdfc cardless emi only, pass method as cardless and provider as hdfc
if you want to check eligibility on simpl and lazypay only, pass method as paylater and provider as simpl and lazypay
etc