Imgur now blocks several VPNs and have issues loading embedded previews in several fediverse platforms. So instead of using imgur, you could use one of the following alternatives for uploading your images.
https://postimages.org/
https://imgbox.com/
https://imgbb.com/
https://www.imagebam.com/
I feel like using this for the sake of posting pictures to Lemmy would just clog up Pixelfed instances with things not even meant for them. Pixelfed is a community, not really an “image host”, even though it technically has that capacity,.