Missiles, not jets, displaced the Royal Navy's Bofors

Did jet aircraft make the Bofors obsolete just as the Royal Navy standardized on it?

No. Britain selected Bofors to avoid costly Pom-Pom redevelopment, and later missile-only thinking rather than jets drove guns off ships.

The Royal Navy chose the established Bofors path because modernizing the older Pom-Pom would have required substantial new investment. Jet aircraft did not immediately make the Bofors useless. Missile-era doctrine instead encouraged designers to remove guns broadly, an approach associated with early concepts for ships such as the Type 22 frigate.