The phrase "granular detail" means providing very specific and precise information or describing something in great depth and specificity. Full definition
The BRV - X also supplements that list with some vivid detail in the more granular details of music that's rarely seen in the portable speaker segment. (digitaltrends.com)
You can see this in more granular detail in the following table. (vox.com)
Literature allows us to explore inner monologue and focus on granular details in a way that stage plays simply can't. (ludonarrativeassonance.com)