Images not shown in pull through cached ECR repository

Hello,

I have set up the pull through cache, using the new repository template feature, with cross account access. I can pull upstream images just fine, the repository is automatically created with the templates settings:

$ podman pull 1234567.dkr.ecr.eu-central-1.amazonaws.com/quay/keycloak/keycloak:23.0
Trying to pull 1234567.dkr.ecr.eu-central-1.amazonaws.com/quay/keycloak/keycloak:23.0...
Getting image source signatures
Copying blob 7e11c5ba1fd2 skipped: already exists  
Copying blob a4503341e3e7 skipped: already exists  
Copying blob 65b190d0545b skipped: already exists  
Copying blob f72461870632 skipped: already exists  
Copying config 33825b7d2d done   | 
Writing manifest to image destination
33825b7d2d9e317215939851e10b1e184b4f876de1b5b25cf448e425c47802bd

However, when I look into the UI, or try and list the images in the ECR, nothing is shown, even though I literally just successfully pulled the image from this very repository:

$ aws ecr list-images --repository-name quay/keycloak/keycloak 
{
    "imageIds": []
}

The UI says no images to display:

Any help is highly appreciated. I tried changing from KMS to AES-256, with and without repo lifecycle, all to no avail. The functionality is given from a user perspective, the pull works, but I'd expect the layers to be visible in the repository. According to this video https://youtu.be/uTyrld7jVrk?t=1703 I should be able to see the cached layers just like if I pushed them, but they're not there.

What am I missing, please?