Is side burn shedding associated with androgenetic alopecia or telogen effluvium?

Side burn changes can be indicative of many things. Changes in the temporal points can occur in AGA. It can also occur in traction alopecia and frontal fibrosing alopecia.  Telogen effluvium would be rather unusual. See a dermatologist if concerned. 

You would need an examination to determine why you are shedding the eyebrows as the causes are numerous and an examination may point to the proper diagnosis. See a good dermatologist