GENERALLY! Is there a correct sleeping position, right recovery position, left recovery position, back, high back support, v pillow, etc?

[Adlon57]

On an ordinary mattress, sleeping on one side, especially if overweight [now slightly👌], night after night, could it cause damage to internal organs, liver, stomach, heart, lungs etc. I have had back surgery [25 years ago], broken [fragile] clavicle right shoulder, broken skull, broken rib cage structure, so have been advised to find a comfortable sleeping position. I know the body has to be adaptable, but have found sleeping on right hand side does affect my liver, so IF possible to sleep on my back would that 'tick' most of the boxes, in getting most of the organs working 'correctly' during the process of sleep?