Just wanted to note that I was able to successfully do this, as well.
Download the ARM64 versions of the static binaries from Tailscale. Then you should install upx on your system (on a Mac like me you can install via Homebrew). Compress using upx --best which should cut the size of the binaries roughly in half, the tailscale binary ended up being slightly larger than the prior version and tailscaled was smaller (for 1.44.0 vs 1.32-dev-t).
After you’ve done that, just scp the two files over to your MT-3000 using the admin password (ssh is root@192.168.8.1 w/ your admin password) and replace the files found in /usr/sbin/tailscale and /usr/sbin/tailscaled with the correct files. Afterwards, disable and re-enable Tailscale on the GL-Inet config webpage. It should work and you’ll see it connected in your Tailscale machine list with the correct version.
Works flawlessly for me.