This is expected as with each release, the oldest supported Linux kernel version is bumped. eg. Android 14 required Linux 4.14+ while Android 13 required Linux 4.9+.
Google maintains a table that shows the kernel versions supported and tested with each Android platform release. The table hasn’t been updated to note Android 15’s kernel requirements, let alone Android 14’s, of course.
The projected EOL for Linux 4.14 is Jan. 2024 anyways, so it makes sense to drop support in V. Still, RIP the Pixel 4a, which runs Linux 4.14 but won’t be getting Android 14 (at least not officially).
CHUCKYSCARNAGE 