Image availability of Sentinel-1 GRD IW product

when i am trying to extract data from ‘sentinel-s1-l1c’ amazon s3 bucket. Sentinel-1 GRD IW data is not covering some part of maharastra,india from 2019-01 to 2019-10.

So,what can be the issues for this? Is it because of how we are querying the product or the censors are not able to visit some part of land area?

You can check what was the planned acquired coverage with Sentinel-1 A/B from here: