https://cloud.google.com/container-registry/docs/deprecations/container-registry-deprecation

The shutdown is scheduled as follows:

Effective March 18, 2025, writing images to Container Registry is unavailable.
After May 20, 2025, reading images from Container Registry is unavailable. Existing images in Container Registry are inaccessible.
Effective July 17, 2025, if you have completed the steps to set up gcr.io repositories in Artifact Registry, then pushing to gcr.io endpoints stores images in Artifact Registry and all gcr.io URLs are served from Artifact Registry. Any images in Container Registry that haven't been copied to Artifact Registry are unavailable.