I setup a proxmox on a bare metal server to create development VMs. The solution that works for me is IPv6. Every VM that I create is publicly accessible, it's secured by a firewall and openssh public key only access. It's standards compatible, every smartphone and tablet has access, including chromebooks. Tailscale is not available on chromebooks. If tailscale looks interesting for your use case, but you'd rather have a standards compliant solution, look into IPv6. From an engineering perspective, it's a much cleaner solution.