mounting nfs share not working

[Lobo2022]

Router Model Affected
Models: RT-AX 58U v2

Firmware Version Affected
3004.388.8_2-gnuton1

Is this bug present in upstream Merlin releases too?
I have an old RT-AC66U B1 with firmware 386.14. and the described command works perfectly

Describe the bug
1- Entware installed through amtm.
2. using BusyBox v1.25.1 mount cmd:
/bin/mount -t nfs 192.168.1.114:yyyy /tmp/xxxx -o nolock,rw,tcp
3. return:
mount.nfs: No such device
mount: mounting 192.168.1.114:scripts on /tmp/scripts failed: No such device
4. using exactly the same (BusyBox v1.25.1) mount cmd on RT-AC66U B1 works succesfully and remote dir is mounted
5. all addittional software installed with opkg is the same in both routers ( some cmds version are newer on RT-AX 58U v2)
6. This pb happens with stock firmware as well.
PS: Later I found that nfs is missing in the kernel. run cmd "find / -name '*ko' | grep fs" does not show any nfs file,

Run command "find / -name '*ko' | grep fs" in RT-AX 58U v2:

ASUSWRT-Merlin RT-AX58U_V2 3004.388.8_2-gnuton1 Sun Aug 4 20:28:14 UTC 2024
Gneco@TESTE:/tmp/home/root# modprobe -l | grep nfs
Gneco@TESTE:/tmp/home/root# find / -name '*ko' | grep fs
/lib/modules/4.19.183/kernel/fs/nls/nls_cp437.ko
/lib/modules/4.19.183/kernel/fs/nls/nls_cp850.ko
/lib/modules/4.19.183/kernel/fs/nls/nls_cp852.ko
/lib/modules/4.19.183/kernel/fs/nls/nls_cp866.ko
/lib/modules/4.19.183/kernel/fs/nls/nls_cp932.ko
/lib/modules/4.19.183/kernel/fs/nls/nls_cp936.ko
/lib/modules/4.19.183/kernel/fs/nls/nls_cp949.ko
/lib/modules/4.19.183/kernel/fs/nls/nls_cp950.ko
/lib/modules/4.19.183/kernel/fs/nls/nls_euc-jp.ko
/lib/modules/4.19.183/kernel/fs/tfat.ko
/lib/modules/4.19.183/kernel/fs/thfsplus.ko
/lib/modules/4.19.183/kernel/fs/tntfs.ko
/lib/modules/4.19.183/kernel/net/sched/sch_hfsc.ko

Run command "find / -name '*ko' | grep fs"in old RT-AC66U B1:

ASUSWRT-Merlin RT-AC68U 386.14_0 Sat Jul 20 17:10:46 UTC 2024
Gneco@Router:/tmp/home/root# find / -name '*ko' | grep fs
/lib/modules/2.6.36.4brcmarm/kernel/fs/cifs.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/cuse.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/exportfs.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/ext2.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/ext3.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/ext4/ext4.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/jbd.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/jbd2/jbd2.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/jffs2.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/lockd.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/mbcache.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/nfs.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/nfsd.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/nls_cp437.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/nls_cp850.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/nls_cp852.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/nls_cp866.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/nls_cp932.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/nls_cp936.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/nls_cp949.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/nls_cp950.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/nls_euc-jp.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/tfat.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/thfsplus.ko
/lib/modules/2.6.36.4brcmarm/kernel/fs/tntfs.ko
/lib/modules/2.6.36.4brcmarm/kernel/net/sched/sch_hfsc.ko

[gnuton]

Hi,
as you correctly checked NFS is not enabled yet.