Hello,
I see Tailscale is available for newer TerraMaster NASs, but their page suggests to request if we need Tailscale on TOS4.
My TOS4 CPU arch is ARM.
The download page for newer TOS is available here https://tmnascommunity.eu/download/tailscale/#
Homepage › Forums › New App Request › Tailscale (TOS4)
Platform: aarch64