Did naruto retain the sage mode given to him by Hagoromo? Or was it lost after sealing Kaguya?
Seeing that Sasuke retained the Rinnegan, I believe it is unfain if Naruto lost some of his extra powers.
Assuming you are referring to the Six Paths Sage Mode, I can find no reference to him having lost the ability, although he apparently always uses it in conjunction with the Nine Tails Chakra Mode.