Article: https://wordpress.org/documentation/article/post-featured-image-block/

Update for 6.3

• Add aspect-ratio to post featured image block. 47854
• Replace "Image size" with "Resolution" in image size controls 44190
• Remove 16:10 from Post Featured Image 48969
• Adjust Post Featured Image PanelBody label to "Settings" 49076
• [Inserter - Media tab]: Upload Openverse images when inserted 48501

Update for 6.2

• Enable image size for featured images in templates. 46848
• Update placeholder style 44190

Updating for 6.1

• Enable gradient overlay. 43838
• Polish placeholder radius and enable duotone. 43425
• Add blurred background to work in nested cases. 43379
• Placeholder: Refactor and simplify dashed placeholders. 43228
• Add link target and rel attributes. 42853
• Add border support applied to inner img. 42847

Updating for 6.0

• Makes cover block dynamic and adds featured image binding. 39658
• Add duotone to placeholders for site logo and featured image. 40085
• Add size selector. 38044
• Move width and height controls into the Dimensions panel. 36540
• Update featured image placeholder graphic. 36712
• Let Featured Image block inherit dimensions, look like a placeholder. 36517
• Show all the controls when inside a Query Loop. 37945
• Add an illustration option to the Placeholder component 41605

General

• Make sure all screenshots are relevant to the latest version
• Make sure videos, if any, are up to date
• Add ALT tags for the images
• Make sure the headings are in sentence case
• Convert all reusable blocks to a ‘regular block’.
• Update the changelog at the end of the article

Notes

1. We are not adding detailed updates for the Block settings - Typography, Color, Layout, Dimension and Border and for the More Options setting in the block toolbar. Pls mention the settings included for the block and link to the detailed settings pages instead.
2. Pls make 6.2 updates first and then move to 6.1.
3. Some of the PRs have great videos that can be added to the article
4. For 6.1, you can pick the screenshots added in the comments previously, if they are relevant.