Hi Tom,
Most if not all of our images have alternative text. It was input in the Alternative Text field for image files in the Media Library. When inspecting these images, however, it shows there is no alt text.
Please inspect the image elements on this page: arenasfoto(dot)com
* The 3 yellow images from Wedding Wire had alt text input in the Alternative Text field in the block editor (it appears when an image block is selected). When inspected, these three images do have alt text.
Thank, Tom.