Reddit shows porn to kids too, as long as they tick the "Show mature (18+) content" box. Same with Telegram, Discord, WhatsApp, Facebook, and the rest.
The only apps that don't seem to turn a blind eye are Instagram, TikTok, YouTube and Snapchat. Epic Games and Roblox also do a great job, both have strong moderation teams and built-in tools to protect younger users. Every company should use them as examples. They've shown it's possible to build huge platforms without ignoring the safety of kids online.
Now that the UK forced these reckless billionaires to update their software to comply with the rules, every government should do the same.
Also I'd question putting Roblox in the child-friendly category. Hindenburg Research characterized the platform as a "Pedophile Hellscape". They obviously have a financial angle as a short-seller, but they point out some issues that seem pretty significant, in my opinion.
> We found Roblox to be an X-rated pedophile hellscape, replete with users attempting to groom our avatars, groups openly trading child pornography, widely accessible sex games, violent content and extremely abusive speech—all of which is open to young children and all while Roblox has cut content moderation spending to appease Wall Street and boost earnings.
> We put together a brief video compilation of Roblox moderation failures