Meaning of Hakim in Quran and Sunnah
The “fa‘il” pattern, in which case hakim refers to hakim, one who issues rules or decrees.
Allah, may He be exalted, is the One Who rules over His creation, and no one has the power to take away from Him His universal (kawni or qadari) rule and decree.
He is also the One Who issues decrees for His creation, so that they follow His religious (Shar‘i) decree, which no one can change or adjust.
Allah, may He be exalted, says (interpretation of the meaning):
{The decision [al-hukm] is only for Allah. He relates the truth, and He is the best of deciders.} [al-An‘am 6:57]
So no one could overturn His decree.
Allah, may He be exalted, says (interpretation of the meaning):
{And Allah decides; there is no adjuster of His decision. And He is swift in account.} [ar-Ra‘d 13:41]
And there is no decree better than His decree.
Allah, may He be exalted, says (interpretation of the meaning):
{And follow what is revealed to you, [O Muhammad], and be patient until Allah will judge. And He is the best of judges.} [Yunus 10:109]
Refer Complete answer and second meaning of Hakim
https://islamqa.info/en/answers/260383/the-meaning-of-allahs-name-al-hakim
