El Salvador is a shining example of how to do a SBR! They publicly post their L1 #bitcoin activity here:

https://bitcoin.gob.sv/

For those like myself who rather check your own nodes, here's the command:

scantxoutset "start" "[\"addr(32ixEdVJWo3kmvJGMTZq5jAQVZZeuwnqzo)\"]"