[NavinF]

Not on NSFW subreddits. Unless this changed recently, you have to upload your image elsewhere and then submit the link to NSFW subs

[syntheticnature]

As best I can tell, Reddit's limitations on posting NSFW with Reddit hosting the image or video are implemented client-side, and unevenly across their first-party clients at that.

[jabroni_salad]

that is only for images in comments. image submissions to subreddits are still ok. A lot of communities have imgur-only rules due to other image hosts having lower retention or invasive UX.

[dageshi]

Best I can tell, you can't create image posts on NSFW posts via the New Reddit Desktop Site. You can via the mobile app.

[peanuty1]

This is also my experience.