Did she delete them?

No, Twitter is just broken to all hell.
It seems that now when you visit a profile without being logged in, they show you that profile's most liked Tweets instead of their latest ones. Just tried it with Elon's account and all I see are 2022 tweets.

Here's a direct link to Madison's Tweet thread:
https://twitter.com/suuuoppp/status/1691693740254228741?s=20
(Note this will show up as a single tweet as opposed to a proper thread if you're logged out)

Ive added the posts to imgur as a album as well. https://imgur.com/a/0Mt6luL

cw: Twitter rant

Twitter is fucking stupid and has a limit on the number of characters you can use in any "tweet".

My suspicion is that this is done intentionally so that users cannot properly explain themselves, which inevitably creates arguments, drama, and "engagement". Mastodon also has this incredibly stupid limitation.

The result is that you end up with people just posting long rants as a series of Tweets (thread), rather than just one, thus bypassing the incredibly stupid limitation, while simultaneously making it super difficult to just read.

This website just gathers all of the tweets from this thread into one post that's easier to read.