IMO, the question cannot be answered; because the sensor isn't really the relevant factor.
The industry standard for acceptable sharpness is based upon viewing an image from a distance equal to the image diagonal (occupying ~ 45deg circular FOV). And this standard requires no more than 1MP for any display size when viewed from the corresponding equivalent distance.
The standard is specified as the maximum **Circle of Confusion (CoC) and it varies with sensor size. E.g. the photography standard for a FF sensor is a 30micron CoC (.03mm). Which means a detail/point can be recorded as large as 30microns in diameter on a FF/35mm image plane... that's equivalent to a square of ~42pixels on a D850 (4.34um pixels). The CoC standard for an APS-C sensor is smaller at 20microns; because "the negative" is smaller and has to be enlarged more for an equivalent display size.
One could say that the CoC standard is weak; I won't argue with that. And it may not be the appropriate CoC you should be using... e.g. 35mm motion picture uses a 20micron CoC, because the image will be viewed relatively larger. But the 30micron CoC is what every online photography calculator uses for a FF/35mm sensor, and it is what is used for the DOF scale on a lens.
All of that is just to say; the relevant factor is how much actual image resolution there is (the recorded CoC). It is almost certainly less than the sensor resolution. And it would require a program like Imatest to determine what it actually is.
Sensor resolution (MP's) really only comes into play when an image is printed so large that the printer replicates the individual squares it is made up of. Which is typically much later (larger) than when the visual image resolution degrades.
**the CoC numbers I used are slightly rounded for simplicity