They’ve slapped hair on the Klingons and are trying real hard to retcon it:
Spock’s more hairy too:
A bit unkempt for a Vulcan. Is it logical? Perhaps he was staying someplace cold and required additional protection?
That Klingon design isn’t meshing well with the hair. Maybe it’s just a matter of getting used to it after seeing everyone bald for a season (and that one movie). Hairless Klingons is a non-issue anyway in the grand scheme of Things That Don’t Work In DSC.