Please correct my English.
The lemming formerly known as:
You should be able to right click (or tap-and-hold) on the image and choose something like “save image as” in order to download the file, or “copy image URL” to copy the URL to your clipboard. You can then paste that URL into a Lemmy comment with the image embed syntax like so: 
Are you saying you saved these as GIF files because you do not see WEBP as useful?
When referring to my WEBP animations, I tend to just use the term “GIF” in the colloquial sense that is a catch-all for “animated image”. But in the most literal sense, yes, these animations are all in WEBP format, not GIF format.
I am also open to requests! I know I need to add “comptrya!” to my todo list
No, its Captain Scully
S3E1 Into the Fire, Bra’tac and Hammond save the day piloting a version of Death Glider nicknamed the Needle Threader.
You can open me in Vim, Greg. Am I a file?
**NO**
Sir, this is a Stargate
After testing a bunch of things, I have to conclude that is a Voyager issue. Uploading using Thunder or just the normal Lemmy UI in a web browser works just fine no matter what instance I use. But using Voyager, I have the same JPEG issue as you do.