Many thanks for the update.
1) Description field field should be empty.
2) Alternative Text field should be empty.
3) Caption field should contain attribution (instead of Description field).
4) License name is missing in attribution:
is marked with <a target="_blank" rel="noopener noreferrer" href="https://creativecommons.org/licenses/by/2.0/?ref=free-media-assets"></a>.
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is marked with <a target="_blank" rel="noopener noreferrer" href="https://creativecommons.org/licenses/by/2.0/?ref=free-media-assets">CC BY 2.0</a>.
5) No need for link to author profile, but image only in attribution:
<a class="fal-attribute" target="_blank" rel="noopener noreferrer" href="https://www.flickr.com/photos/131042142@N05/16253860307">Wallpaper</a>" by <a target="_blank" rel="noopener noreferrer" href="https://www.flickr.com/photos/131042142@N05">DyosEL</a>
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<a class="fal-attribute" target="_blank" rel="noopener noreferrer" href="https://www.flickr.com/photos/131042142@N05/16253860307">DyosEL</a>"
6) Attribution needs prefix, such as “By: “