Individual data requests are not drillable right now, though we understand that this may be a useful feature for users and may look into adding this functionality in the future. The vast majority of workload usage consumption is not from individual requests. So, for most customers, it’s more useful to focus optimization efforts on the areas consuming the most workload.
To provide some context on Individual Data Requests: this means when an expression fetches data about a specific thing in the database, such as the Current User's Company (Company being the thing requested). For example, if the "trigger custom event when data changes" is triggering mget requests, these will consume workload as an individual data request. Therefore, these should be visible in the WU pie chart for Fetching Data → Individual Data Request.
Although we are unable to drill into Individual Data Requests, you can learn tips on how to optimize your app for workload usage at the resources listed below:
Our interactive walk-through of the new workload charts
Our Workload Optimization Webinar recording
Our Workload Explained and Workload Efficiency 101 blog posts
Our Technical Documentation about what contributes to workload