A1 plate temperature

I tried checking the temperature of the plate with a professional temperature gun.
Comparing with the plate set at 65 degrees which in the center is 57 degrees, the entire front part is 52 degrees and the rear part is 54 degrees, the measurement is about 6/7 cm away from the edge.
Is there a way to make an adjustment?
Of course I didn’t expect a dish that heats up with this difference.

The PEI Texture affects the laser in the non contact temperature gun. Remove the plate and check on the heatbed temp.