Fujifilm X-T30 has a 26.0MP APS-C (23.5 x 15.6 mm ) sized BSI-CMOS sensor and features X-Processor 4 processor. On the other hand, Nikon D7200 has a 24.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Expeed 4 processor.
Another similarity between these two cameras is that both Nikon D7200 and Fujifilm X-T30 sensors lack anti-alias (Low-Pass) filters. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moire occurring in certain scenes.
Below you can see the X-T30 and D7200 sensor size comparison.
Fujifilm X-T30 and Nikon D7200 have sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Nikon D7200 has 8% larger pixel area (15.28µm2 vs 14.12µm2) compared to Fujifilm X-T30, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.