If you are using a MikroTik router, I would HIGHLY recommend using the built-in Wireguard based “Back to Home” VPN. I use that all the time and I have zero problem accessing my NAS units or any of their applications. In fact, I have an automation on my phone that connects to the VPN whenever I lose my WiFi connection on my home network. Works great.
I also sometimes run the built-in ZeroTier VPN. ZeroTier is a little bit more complex to configure but you literally can run your VPN like you are right on your LAN and pass UDP traffic and other bits that you can’t pass over a normal VPN.