In Organic chemistry we are not so careful with the bond angles. Often we state if the angle is close to 109 degrees or close to 120 or 180 degrees. It its sp3 we don’t worry about 107–we just say 109 (that is , “close to” 109).

There are really only 3 shapes. Tetrahedral, trigonal planar, and linear. The “extra” shapes (such as “bent”, “trigonal pyramidal”) just arise from the fact that a lone pair is present instead of a bond to an atom. Don’t memorize every compound/ion. Just learn to count the number of electron pairs and go from there.

It could be the chloride, I arbitrarily picked fluoride.

Why can it not be beryllium(II) chloride?

In my opinion, both carbon and nitrogen are sp3 hybridized and tetrahedral molecular geometry, the different is that carbon is symmetrical sp3 hybridized, thus endowing the bond angle 109 degree, while nitrogen is asymmetrical sp3 hybridized, thereby giving the bond angle 107 degree.
In summary, from the perspective of carbon or nitrogen, we get variety of bond angle, with the figure being 109 and 107, respectively.

Oh, thank you!