I did it from the web. I just kept clicking the photo button and it worked ¯⁠\⁠_⁠(⁠ツ⁠)⁠_⁠/⁠¯

If you post in the body rather than the URL this happens. However, on Jerboa at least, it means you can’t zoom in on any image or easily download, which is kind of annoying. That’s more of an app problem, though.

The syntax for an externally hosted image is ![my-alt-text](https://example.com/my.webp). You can put multiple of those in either a post or comment.

I haven’t done it with uploading multiple images to the instance, but I believe you can just keep clicking the add image button. It doesn’t do any fancy previews like the single field in the post for an image, and if you want a preview you have to put one there and more in the body. It’s not a great system, but it works sort of ok.