Hi AlaNaifa,
Yes that is right ,if you configure the MX as a Spoke and the IPv4 Default Route was checked, the MX would be doing full-tunnel VPN to the hub site, sending 100% of its traffic to the hub, and thus a Local Internet breakout option would be present on the SD-WAN & Traffic Shaping page.
If that is not the case and the MX is not spoke with default route to the hub, the MX will already be doing split-tunnel VPN to the hub and it has Local Internet breakout for anything not behind the hub and thus a Local Internet breakout option on the SD-WAN & Traffic Shaping page is not presented in this case.
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