Force resize externally linked images? Generate thumbnails of externally linked images?

External images could be linked and displayed using:

• ![](external url)

Then Lemmy images could be resized which I think also shrinks the file size; hence faster display time, save internet data, and save screen space; by adding &thumbnail=:

• ![](https://lemmy. .../pictrs/image/... .webp?format=webp&thumbnail=320)

So, is it possible to do similar but for any external image? Or at least generate thumbnails of many external images? Thanks in advance.