To test tailscale stable version binary you can upgrade it manually for MT3000,
cd /tmp; curl -f -L https://pkgs.tailscale.com/stable/tailscale_1.52.1_arm64.tgz -o tailscale_1.52.1_arm64.tgz
tar -zxvf tailscale_1.52.1_arm64.tgz
mv tailscale_1.52.1_arm64/tailscale* /usr/sbin/
Keep in mind the firmware version needs to be 4.5 at least.