Anyone hosted Grafana 7.4 on AWS ECS with EFS for persistent storage

Wondering if anyone has managed to set up Grafana on AWS ECS using EFS as the persistent storage volume?

We’re having issues trying to set file permissions for 7.4. I’ve raised a stackoverflow question about this with more.
amazon ecs - Grafana 7.4.3 /var/lib/grafana not writeable in AWS ECS - EFS - Stack Overflow

If anyone is able to help that would be great