GoPro Hero10 Black has a
23.0MP (1/2. ) sized CMOS sensor and features GP2 processor. On the other hand, Olympus TG-6 has a
12.0MP (1/2. ) sized BSI-CMOS sensor and features TruePic VIII processor.
GoPro Hero10 Black's sensor provides 11MP more than Olympus TG-6's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the Hero10 Black and TG-6 sensor size comparison.
GoPro Hero10 Black and Olympus TG-6 have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture.