Aqara controls the distribution (rollout) of the updates through their hub so it’s gradual, may halt it if they detect something and then resume it, so the latest firmware is not available for everybody at the same time.
Home Assistant access the so called Matter DCL where vendors can publish the firmware update files for certified firmware versions so the platform can apply them: everybody sees the latest firmware. Well, unless they invalidate it like happened with the P2 door sensor twice (1.0.1.1 because it bricked devices and 1.0.2.0 because, I believe, reported wrong states) which now cannot be updated from Matter, only with Aqara hubs and only if it appears for your account.