Replacing over exposed sky in a photo

[Ofnuts]

(05-29-2023, 06:35 AM)PixLab Wrote: 3)  a quick third method that I hate but beginners love, put underneath a blue sky, then select the white part of the sky and delete it,

Usually, yes, but it makes sense here since the colors are very quantized (the OP's image could be even more quantized, some of the quantization having been blurred by the JPEG compression).