Exactly what the title says, I'm compiling a list of sites that allow loli, shota, and cub context. If there is something I've missed, please let me know!
InkBunny - Cub only, no NSFW human art allowed, but you're free to link to it off site as a thumbnail. Very active community, lax rules. Highly recommended if you're really into cub stuff.
Pixiv - Allows everything so long as it's drawn. Highly recommended. The only major drawback is that all NSFW has to be censored, due to Japanese law. However, a little black bar is a small price to pay. Site is mostly a Japanese userbase, however the site has become a lot more easy to use for foreigners. Not much of a community per se, as there's not journal features and comments are mostly "nice art", etc. They do have communities, but most are in Japanese so I have no idea how active they are. That said, I cannot recommend this site enough; it's where I get most of my hentai from.
Pawoo - Allows everything drawn and has the exact same rules as Pixiv, since they own this site. It's a Mastodon instance so it works a little bit like Twitter. Don't use this one as much, so I can't speak to how active it is.
Baraag - Allows everything drawn. It's got a small but very friendly and welcoming community. I highly recommend this site and wish to see it grow. It's also a Mastodon instance so it works similar to Twitter.
HicceArs - This site allows everything as far as I know, and you can add a payment method for some of your galleries. I don't know much else about this site so I can't speak for it's community or anything.
Pomf.tv - A streaming site similar to Twitch that allows loli/shota/cub content.
Telegram - A messenger application; somewhat similar to Discord but you host channels rather than an entire server. Unless you upload an image as a file download, then they will be uploaded in lower quality. Hit and miss, really.
SoFurry allows such content as well, though it isn't prominent there. They allow humans too, though they want a certain furry to human ratio that I can't quite recall off hand.
SoFurry ( www.sofurry.com ) allows such content as well, though it isn't prominent there. They allo
