>>7880315 (lb)
>>7880344 (lb)
The Chief Justice of the United States does not sign FISA warrants. The final signature is from a FISC judge, who the Chief Justice appoints. They are signed by three people. Typically: an agent (think McCabe), head of agency (RR), and then the FISC. Here is a CP application.
https://vault.fbi.gov/d1-release/d1-release/view