It is a lot of fixes and the Android Security Bulletins of June and Android 17 also had a lot of fixes [1], despite ASBs only containing high/critical vulnerabilities (other vulnerabilities are only fixed in major releases and QPRs, which most Android vendors respectively roll out late or never at all).
I think the story here is that vulnerability discovery has accelerated a lot with LLMs, but since are adversaries are doing the same, it is more important than ever to update quickly (and not let some Android vendors get away with their lazy update schedules).
[1] https://source.android.com/docs/security/bulletin/2026/2026-... https://source.android.com/docs/security/bulletin/android-17
So using newish phones that don't get updated anymore could be a lot more dangerous now than it was just a year ago.