To regenerating limbs and things like this. But that level of ability is insanely advanced, BEYOND Magnum Opus level.
One can influence the outer layer of skin, then the hair and nails, then other things progressively. Minor blockages in organs (depending on what they are) can be pushed away here. If one can't outright cure things inside the body, some things may need long-term workings to keep them stable. Then there is a sliding scale of things to influence.
Other things like teeth, ruled by Saturn, are deceptively complex to generate and come much further down the line so one must take care of their teeth. Virulent diseases can be very difficult to cure.
Beyond some genetic diseases that result from low bioelectricity and can be theoretically avoided, horribly botched genetic diseases from birth like mitochondrial diseases or Down's are so ridiculously difficult to "cure" you might as well not even bother. It sounds cruel, but without appealing to the Gods, but one has to learn to let go in these situations.
You can improve your own beauty immeasurably with Magick, but stupid ideas like 'biokinesis will make me look like a 50 foot tall gigachad from 40k with a face that looks nothing like mine' needs to be thrown in the garbage can. If you hate and cannot accept yourself you will never ascend to this level anyway.