Do you let them use the internet? YouTube? ChatGPT is roughly the same thing but more sanitized.
to answer your question, no they are not allowed on youtube, tiktok or any social media. All games with chat are enable with only their friends which i have to approve. they have youtube kids but they don't like it, so they never use it.
The other problem is that most of their friends have access so they probably show them stuff on their devices :(. Some of their friends have ZERO limits and restrictions - not sure if it's ignorance on the parents part or they are ok with it.
I heard recently denmark banned social media for anyone under 15 (i think) which i believe is a great step and i wish we do it in the US.