Sure now that Shukaku and Gaara seem to be cool with each other.

I believe Gaara slept soundly the first night after Chiyo's death, with Shukaku no longer inside him.

Bet he slept like a log, first sleep in...forever. Too bad being Kazekage is probably an early morning sort of job.

Probably

Speaking of which those dark lines around his eyes, mascara or sleep deprivation?

That's due to the Magnet Style inherited from his father.

Probably not. His dad didnt have it all the time, only when he actually used magnet release.

Having not slept for so long, its possible they wont go away. It might also be because he was exposed to Shukaku's chakra before birth, kinda like how Naruto/Himawari/Boruto have whisker marks.

Ah those are good explanations, thank you.

Gaara most likely Was able to sleep after he was revived by *Chiyo If not then he has some serious problems.