CHA-ATL or reverse...
22 minute flight
106 miles

Fly this route about 30 times a year. 67% non DL RJs

98% of the time, the FA never leaves their seat up front facing all of us.

However, on occasion, they have walked the cabin.
And I know once, maybe twice, there was full service: drinks and snack.

If DL bird with first - F almost always gets drink and snack.

So I think it depends on the carrier AND the FA.
I think they are NOT expected to give service, so that is the easiest thing to do.
But a few are either new or exceptional and go the extra mile (107)