MTU being only 1280 can't be right, my connection looks like a normal 1500 MTU...
The v4 IP shown in the measurement which is only 10ms from something, I do not think the ICMP echo is faked, that's the terrestrial gateway side of the cgnat. Which in the examples of my own starlink terminal and several others, is some item of Google equipment located near a major city's IX point. The "public" side of the cgnat for my terminal is less than a millisecond from core stuff in Seattle.
Starlink terminals which exit to the Internet through a gateway in Chicago, have global-routing-table facing sides of their cgnat only 1 to 2ms away from several ISPs' looking glasses at 350 E. Cermak and other IX points in Chicago. But the end to end latency from a terminal is more like an absolute minimum of 16ms, more often an average of 23ms.