Sushovan: Image rejected due to quality issue

[SushovanSar]

Hello friends

Please let me know what went wrong in the attached image for it to get rejected here showing a Quality Issue.

Please help me understand

[Abambo]

Nice panorama, but there are some errors with that one:

The histogram shows missing whites:

the clouds look not natural, because of the strong denoising.

There is a strong noise level in the mountains:

The mountain tops look like cutout, the mountain structure does not have the same sharpness. This looks edited.    

(Red arrow: sharp border, yellow arrow: soft border)

…and this part of a plant could be edited out: