snap is huge, contains unnecessary cruft
The snap of eldarya is 1.7G. This is unnecessarily huge, and is caused by the snap containing mountains of cruft.
Unpacking the snap with unsquashfs reveals an app.asar file which further contains multiple builds of the application, libraries, electron and more. Within that there's another app.asar file which contains yet more old builds of the application. It also contains an older build of the snap (which is around 200MB - much more reasonable!).
I recommend you check out your source tree and rebuild the application snap once and ensure it's of a reasonable size, before installing, testing and uploading a new build to the store.