Sensor sizes/pixels on bird comparisons?

Has there every been a comparison between multiple bodies using the same lens and then cropping to frame the subject equally in size?

I've found this https://www.dpreview.com/reviews/image-comparison?attr18=daylight&attr13_0=canon_eosr5&attr13_1=canon_eosr7&attr13_2=canon_eosr6ii&attr13_3=apple_iphonex&attr15_0=jpeg&attr15_1=jpeg&attr15_2=jpeg&attr15_3=jpeg&attr16_0=100&attr16_1=100&attr16_2=100&attr16_3=32&normalization=full&widget=1&x=0.8685086771102742&y=-0.1861278201833268 but it doesn't seem to take into account the crop factor.

For example, what I'm looking for is a case where you have

1. Three different bodies 45MP R5, 32MP R7, and 24MP R6

2. Same lens, say the RF100-500 at 500mm

3. The subject being far enough away such that even the R7 @ 500mm can't fill the frame with the fake bird

4. Your position remains the same between shots, no zooming with your feet

5. Each image is then cropped to fit the bird in the frame

6. Comparing resulting differences

TIA!