Dynamic range is a measure of the sensor's ability to capture detail in extremely dark and bright areas. It's measured in EV (exposure values) and the higher the figure the better.

Fuji X Pro2 lab tests

JPEG dynamic range analysis: Fuji cameras typically deliver lower dynamic range JPEGs than rival brands, presumably as a result of higher mid-tone contrast. This tendency is repeated here, though the X-Pro2 does at least deliver consistent results across its sensitivity range.

Fuji X Pro2 lab tests

Raw (converted to TIFF) dynamic range analysis: The results are much closer when comparing raw files, and here there's little to choose between the X-Pro2 and the rest.