Both Sony A6300 and Canon M50 have 24.0 MP resolution sensors but Sony A6300's sensor is APS-C (23.5 x 15.6 mm ) and Canon M50's sensor is APS-C (22.3 x 14.9 mm ).
Since Sony A6300's has a larger sensor area with the same resolution, this means that it also has a larger pixel area hence better light collecting capacity for a given aperture compared to Canon M50.
Below you can see the A6300 and M50 sensor size comparison.
As seen above, Sony A6300 has a 1.1x Larger sensor area than Canon M50. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.