@nellie_m@home.social That's a good point and you can send #a11y comments to the relevant #EU service with Europe Direct:
https://european-union.europa.eu/contact-eu/write-us/answering-your-questions_en

Description of images in the European Commission accounts mirrored in #ResPublicae is typically provided in the text of the post or in the linked documents. Sometimes you unfortunately have to follow links through Nitter.

In this case for example the description of the image is "cloud-free view of the Viedma and Argentino glacial lakes in Argentina".