Custom author avatar with GenerateBlocks

In my post meta, I want to use custom author avatars instead of the WordPress Gravatars.

So far, I have created a block element that I am designing as a Page Hero, to display headline, featured image and post meta information.

In order to upload custom images to my WordPress users, I have created an image field called “author_image” using the ACF Plugin. This allows me to upload author images on the WordPress user page.

I am stuck however, when it comes to displaying dynamic images on the frontend. I tried to use the GeneratePress “dynamic image” block, set it to type “Post Meta and enter “author_image” as a Meta Field Name. I also tried using the image block of GenerateBlocks, enable Dynamic Data and then choose Post Meta – but my custom field does not show up in the “Post Meta Field” dropdown.

Thanks for helping!