The old subreddit had a "lounge" chat where I mainly just linked to things their creators ask not to reupload. Here are all of them in one post so it doesn't spam up anybody's feed:
November 29, 2022: I like how that worked, so here's another work from an artist that requests not to be reposted. It's Children of Fire by Yamakawa, on Tumblr and pixiv. They're Tanjiro and Nezuko Kamado from Demon Slayer: Kimetsu no Yaiba. I haven't seen that show, but these characters aren't known for flying.
February 2, 2023: I also was about to post Balloon Walk by Hako, but they ask not to be reposted either. That's OK. There is plenty more Sonic fan art out there. I can make do.