You will notice these two spots when the screen displays white or very bright colors. You can compare with the other photos to see the difference.
Apple iPad Mini 5th Gen 64Gb Wifi & 4G Gold & iPad Mini 4th Gen 128Gb For Repair
Apple iPad Mini 5th Gen 64GB Wi-Fi - Space Grey - Cracked Screen
Apple iPad mini 5th Gen Wi-Fi+Cellular 64GB Space Gray - B Grade
Apple iPad Mini (5th Generation) 64GB, Wi-Fi, 7.9in - Pink
Apple iPad Mini 5th Gen 64GB WiFi Silver Unlocked Very Good Condition
Apple iPad Mini 5th Gen (2019) 7.9" A12 64GB 256GB All Colours - Good
