If you leave it alone it will probably regrow slowly. Succulents should be planted in a pot with a drainage hole in a fast-draining medium. If the larger plant in the photo is what was broken off, let the bottom of the stem dry for a few days and then stick it in potting medium and it will probably grow roots. You may have to remove a few leaves before re-potting the top. Also, it needs to be in bright light, doesn't have to be direct sunlight.

to be certain im talking about the succulent in rhe front with the one large leaf letft.

your suggesting taking it out of the soil to callus ? they are both in pot together with succulent/cactus potting mix. the larger one behind was damaged previously as well but has been healing much faster .

im not seeing much new growth at with the other which is why im concerned 😞