The hadith in Bukhari alone gives you the understanding of what it means when it says Allah ﷻ is time as this just means he causes the revelation of day and night
Sahih Muslim 2246e & Bukhari 4826
Imam As Shafi’i (d.204AH) says the arabs used to curse time whenever hardship befell them, so the prophet ﷺ rebutted them by saying that Allah ﷻ is the one who arranges our affairs so they shouldn’t curse time
Translation: Imam Ash-Shafi’i (d. 204 AH) said: “Its interpretation, and Allah knows best, is that it was the custom of the Arabs to blame and curse time when calamities such as death, loss, or destruction befell them. They would say, ‘We are being destroyed by time,’ referring to day and night, and they would say, ‘They have been afflicted by the vicissitudes of time, and time has annihilated them, so they ascribe actions to day and night.
Thus, they would blame time because it is what destroys and acts upon them.’ So the Messenger of Allah said: ‘Do not curse time,’ meaning, do not attribute to time the acts of destruction and afflictions, for when you blame the doer of these actions, you are in fact blaming Allah, Exalted be He, because it is He who is the true doer of these actions.”
Sunan Al-Kubra (3/509)
Ibn Qutaybah clarifies this matter also
Translation: Imam Ibn Qutaybah (d. 276 AH) said: I will give an example to clarify this matter, so you can understand it better. Imagine, by the grace of Allah, there’s a man named ‘Zayd’ who orders his servant named ‘Fath’ to kill someone, and Fath does so. Then people curse and blame Fath.
Someone then says to them: ‘Do not curse Fath, for Zayd is Fath.’ He means that Zayd is the killer, because he was the one who gave the order, so it’s like saying, ‘The killer is Zayd, not Fath.’ When calamities and disasters occur in one’s lifetime, they happen by the decree of Allah.
People blame and curse time because of these calamities and disasters that occur within it, although time itself has no power over them. So someone says: ‘Do not curse time, for Allah is the time.’
Ta’wil Mukhtalaf Al Hadith by Ibn Qutaybah Pg 325-326
