First and usually reliable:
I dragged the image to a folder on my computer (You could save the image to camera roll on a phone or tablet) and shared it with an image host.
You can do the same. Sure, it's an extra step. Image posting on DU is always an extra step unless you can get an image URL.
Well, I right-clicked (control-clicked) on the image and it's URL is not suitable for DU. That's why the download and share.
https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:y4zs4cabaezzwx3bz2e5nnj2/bafkreihfsqbwigbuhbu7scurehymxk2bdtaut7rkitanfavsvoytqpazaq@jpeg
P.S. some images can't even be dragged. In that case, I do a screensnap and save that to disk, and share via an image host as above.
It's a pain but managing my IRA distribution was a much bigger pain. Glad that session is over with.
Nothing comes easy except trouble.
Gotta deal with things.
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Postimages has been reported by cloudflare as a potential phishing site, go figure, but I never give them any personal info. You can bypass the warning. I use imgbb a lot, but postimages is a little quicker and easier to use.