look at your own location.
What do the Sgts do on your Squadron that you don’t?
We is written above is correct, but the best guidance is what goes on in your own Bubble. A Sgt on one Squadron will differ to the next Squadron 10 miles down the road so consider what your Sgts are doing, what experience have they got (camps, courses, PTS badges, qualifications) they have you don’t.
Some COs go on who they trust, maturity and length of service, others have a stricter tick box of having completed X camps, Y courses and have Z years experience so I would say consider all of what has been suggested and compare that to your Sgts and see what your missing.