Not the OP but I run a Minio instance in my homelab. It's not in HA-mode but is on a VM that is replicated across my 3 proxmox nodes. I just use a simple docker-compose file (17 lines) and haven't run into any issues yet.
I have three physical nodes (Dell micro-PCs) and the VM will automatically failover if one node is lost. It's not quite instant but meets my requirements fine.