Warning  ExternalExpanding   2m36s                 volume_expand                        Ignoring the PVC: didn't find a plugin capable of expanding the volume; waiting for an external controller to process this PVC.
  Normal   Resizing            113s (x9 over 2m36s)  external-resizer <http://driver.longhorn.io|driver.longhorn.io>  External resizer is resizing volume pvc-705ba471-4f1a-4514-849a-e4d741964be6
  Warning  VolumeResizeFailed  113s (x9 over 2m36s)  external-resizer <http://driver.longhorn.io|driver.longhorn.io>  resize volume "pvc-705ba471-4f1a-4514-849a-e4d741964be6" by resizer "<http://driver.longhorn.io|driver.longhorn.io>" failed: rpc error: code = Internal desc = Post "<http://longhorn-backend:9500/v1/volumes/pvc-705ba471-4f1a-4514-849a-e4d741964be6?action=expand>": EOF

How to resolve this RWX volume expanding ?

Is your environment still:

k3s: v1.25.4+k3s1
Worker and Master: Redhat 8.5
Longhorn: 1.4.1

And could you help us check any abnormal logs about the expansion of longhorn-manager pod or provide the support bundle?

Will share the support bundle , may I know the mail id