How to create an image from running container in K3S

Hello All,
I’m trying to create an image from running container in K3S(Airgap), I couldn’t find any option through ‘crictl’, even I’m trying to create through docker but it is not displaying.

I placed the image inside ‘/var/lib/rancher/k3s/agent/images/’

[root@oasis-glowroot postgress]# crictl ps |grep -i postgres
dfc30d6a15b0f 106bdfb062df6 28 minutes ago Running postgres 0 784d81a1dc38c
[root@oasis-glowroot postgress]#
[root@oasis-glowroot postgress]#
[root@oasis-glowroot postgress]# docker ps |grep -i postgres
[root@oasis-glowroot postgress]#

Could anyone please help me.

Thank you in advance!!