In sujud can you confirm what is obligatory of the palm? I place my whole hand including my fingers and the whole of my palm flat on the ground. I also place my thumb on the ground but as the thumb curves out and doesn’t lie flat like the other fingers is it sufficient to place only what is possible for the thumb i.e the bottom part of the thumb that connects to the palm? as there will always be a part of the upper thumb that won’t be resting on the ground.

It is only required to put your palms on the ground.