Both Canon RP and Sony FX30 have 26.0 MP resolution sensors but Canon RP's sensor is Full frame (35.9 x 24 mm ) and Sony FX30's sensor is APS-C (23.5 x 15.6 mm ).
Since Canon RP'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 Sony FX30.
Below you can see the EOS RP and FX30 sensor size comparison.
As seen above, Canon RP has a 2.4x Larger sensor area than Sony FX30. 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.