She said it on the floor of the House, and in a subsequent press conference the following day. Obviously, she's a politician, and can be just saying the words that she needs to say to propel her career. But the same can be said for almost any apology, and the way apologies go, this one was pretty strong IMO.
See minute 45:45 here - https://www.c-span.org/video/?508492-2/house-votes-remove-rep-marjorie-taylor-greene-committees-230-199
She didn't delineate every single one of her kook claims, but she said she's sorry for all the stuff she believed.
I'm going to humbly disagree and say that could barely be called an apology at all, let alone "pretty strong". Even the things she does specify, like David Hogg, she doesn't actually apologize for. And as far as low bars go, "9/11 happened" is a hall of famer.
In this "apology" she focuses more on unrelated issues such as abortion and her personal religious views than the issues in question, so it's not a matter of not being given enough time. And whenever she wasn't speaking of unrelated topics, she was making false equivalences, trying to martyr herself, and just generally sounding like a fool. She could have gotten a better speech written on Fiverr.