When I want to store a long rich text article with images in Airtable, what I do is upload the images to Softr, then reference them with <img> tags.
For example, in this FAQ there are entries that have multiple images.
In Airtable, a rich text field from that FAQ looks like this:
And I got the images into Softr by uploading them into an image picker popup such as is displayed when you change the image on a CTA block, then using the link button to get the URL of the image on Softr’s CDN.
This works well enough for me. But I get it that it’s not really using Airtable as the source of truth for all content. And now that Airtable has turned off the ability to reference image attachments by URL, I don’t know of any way for the images to truly live in Airtable.