You can set the number of Kernel in Grub in the config file:
/etc/dnf/dnf.conf
The Default is: installonly_limit=3
Which means it will keep 3 boseos kernels, plus as an example 3 kernel-lt
Try to change it to 2, and that will remove 1 kernel each.
The default AlmaLinux /boot partition size is usually big enough for 6 kernels easily.