You can create your ANN or announcement thread for your token in Announcements (Altcoins) section. You can post anything related to your project or token, whether they are links to social channels, exchanges that are going to list the token, or anything else in general. What you can't post are referral links, which are against the rules:

Yes, you can post your announcement in the Altcoins section, specifically in the Announcements (Altcoins) > Tokens (Altcoins) board. There are no specific rules that limit the publication of links to other platforms or Telegram channels, unless they are mixer platforms. You also need to be aware of the rules against plagiarism. Dont copy content from other projects or sources without giving them proper credit.

For better credibility of your memecoin project, you might want to keep this guide of not publishing your ANN thread using AI - Generated, copied and pasted from AI.

You are free to publish links, exchanges and telegram chats.

In general, what you need right now is written here as your guide before publishing a thread. What is allowed and prohibited is also written there, so you need to read it.

Unofficial list of (official) Bitcointalk.org rules, guidelines, FAQ

Don't use AI to create thread. Don't copy paste and don't link anything that could potentially harm users. Links that compromise user security are also prohibited, as are illegal trading apps or telegram channels. If you can make sure that all of that is safe, then I think you are allowed to post it. Read points 11, 22, 33, 34, and 35.