Lump on eyelid

7 year old GSD has this lump on his lower eyelid, any ideas what it could be?  Vet appointment isn’t for a few days.

Hello!  There look to be two lumps here; one pinker-looking one, perhaps on the edge of the lower eyelid margin, and another covered by dark skin just below the eye, situated below the pupil and the pinker margin-lump in this photograph.  I wonder whether the pinker lump is obstructing the duct of the lower meibomian gland and thereby causing the tear / eye discharge to build up lower down.  If so, this is known as a chalazion.  Possible obstructions in these cases can include demodex mites, papilomata or even cancer.  Generally eyelid lumps ought to be triaged and seen by your vet.