Need help with IBR600C and integrating Starlink

Currently stuck at getting internet to actually work through the Cradlepoint. we have a Verizon SIM card used for cellular but testing to see how SL would preform as a back up service. I have the SL hooked up to CP via ethernet WAN and its connected on net cloud by having the SL on public ip address and used 143.105.61.76 as ip 143.105.60.1 as gateway 24 bits and DNS 8.8.8.8

Says its connected but whenever I make it as primary I lose internet service.