Hello,
There is no way to track individual contributions to a sprint other than the task filter.
This is intentional. Indeed, such feature can be easily abused and favor micro-management whereas agile methodologies rather encourage shared responsibility (both for success and failures) and collective discussions regarding improvements (through “retrospective” meetings).
To be successful, this requires communication, mutual trust, honesty, transparency… which is not easy to get but we want agile teams to head towards these values rather than helping them keeping the opposite ones.