Permission denied when accessing persistent volume - kubernetes

Question

I have a kube cluster running using kind. Kind runs in a docker container. It has access to a volume by way of the following:
extraMounts:
- hostPath: /mnt/disk-1/shared
containerPath: /shared-drive
... the persistent-volume and pvc configuration:
---
# Volumes - PVC write
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: pvc-write
namespace: ingress-nginx
spec:
accessModes: [ReadWriteOnce]
resources:
requests:
storage: 100Gi
---
# PV
apiVersion: v1
kind: PersistentVolume
metadata:
name: shared-drive
namespace: ingress-nginx
spec:
capacity:
storage: 100Gi
accessModes:
- ReadWriteOnce
storageClassName: standard
hostPath:
path: /shared-drive
... the request for the volume in the deployment template spec:
spec:
volumes:
- name: shared-drive
persistentVolumeClaim:
claimName: pvc-write
readOnly: false
...
volumeMounts:
- name: shared-drive
mountPath: "/shared"
Other observations
From within the container where I need access to the shared volume:
(accessed by docker exec -ti cluster-control-plane bash -> crictl exec -ti the-container sh)
> ls -l /
...
drw-rw-rw- 2 appuser appuser 26 Oct 9 19:36 shared
I can view a list of the files in the shared directory
I cannot read nor write to the directory
I can read and write in other directories belonging to appuser
The volume being shared by the host (the host running kind) has rw permissions for "other" users
I've played a bit with setting the securityContext for the container without success. This attempt was not thorough as I'm at a loss for how to interpret what I'm "solving for". So for instance, the following did not solve the problem:
# included in the deployment template spec
securityContext:
runAsUser: 999
runAsGroup: 999
fsGroupChangePolicy: "OnRootMismatch"