now it looks like this:
sh-5.1# ls -lha /boot
total 123M
drwxr-xr-x 5 root root 4.0K Aug 8 19:25 .
drwxr-xr-x 17 root root 4.0K Jun 13 15:15 ..
-rw-r--r-- 1 root root 50K Jul 15 16:22 amd-ucode.img
drwxr-xr-x 3 root root 4.0K Jan 1 1970 efi
drwxr-xr-x 6 root root 4.0K Aug 8 19:25 grub
-rw------- 1 root root 36M Aug 8 19:25 initramfs-5.15-x86_64-fallback.img
-rw------- 1 root root 13M Aug 8 19:24 initramfs-5.15-x86_64.img
-rw------- 1 root root 41M Aug 8 19:25 initramfs-5.18-x86_64-fallback.img
-rw------- 1 root root 14M Aug 8 19:25 initramfs-5.18-x86_64.img
-rw-r--r-- 1 root root 22 Aug 3 13:18 linux515-x86_64.kver
-rw-r--r-- 1 root root 22 Aug 3 13:17 linux518-x86_64.kver
drwxr-xr-x 2 root root 4.0K Dec 20 2021 memtest86+
-rw-r--r-- 1 root root 11M Aug 8 19:24 vmlinuz-5.15-x86_64
-rw-r--r-- 1 root root 11M Aug 8 19:24 vmlinuz-5.18-x86_64