My lichess lobby is blank and so I guess I have been flagged for cheating but I have no idea why.
Perhaps your computer will know!
I swear I haven’t been using an engine though.
If you really truly think you are unfairly flagged see: lichess.org/faq#marks
However, if you did use a computer, there's no point in wasting their time to review it, it would be better to learn the lesson and just move on.
Send an Email to email@example.com and see lichess.org/contact#help-appeal-cheat
You can't post in the forums yet. Play some games!