Not sure which juniper species this is. Also, is this a running or mounding juniper? Also, is the sharp needles indicating juvenile growth as to opposed the flat needles?
Could be a procumbens juniper, though hard to say with the mix of juvenile and scale foliage.
Should there be juvenile growth?
It’s not unusual for there to be a mix of juvenile and scale growth on procumbens junipers, particularly on older specimens.
Is it typical of foliage lower in the branch to brown and fall off as the foliage on the tips grow?
Yes - it’s the inside foliage that browns and falls away first.