Addendum: this is only required on Focal as Groovy images onwards switched away from using u-boot, and isn't required on Bionic as support for the Zero 2 only extends to the most recent LTS (focal).
Addendum: this is only required on Focal as Groovy images onwards switched away from using u-boot, and isn't required on Bionic as support for the Zero 2 only extends to the most recent LTS (focal).