105W Boost Starlink Mini Car Adapter—Stops Reboots & Power Supply Damaged Starlink Mini Cable+Cigarette Lighter Adapter 12V-24V with Digital Display DC Power Cable for Car, Rvs, and Boats (6.5FT)

You need a higher voltage. Whatever you're powering it with is dropping out under the upload current. That's when Starlink terminals take the most power. If you're using some kind of battery and USB type C cable, the port isn't handling the current needed. Something like this https://a.co/d/01um0vwu will be more reliable.