Sadly X broke guest accounts, and Nitter only works (self-hosted) if you ser up an X account to get the tokens:

https://github.com/zedeus/nitter/issues/1200#issuecomment-2094840241

There are public instances but unless they have hundreds of accounts (xcancel.com has 500 accounts if I recall), they tend to get rate limited... Nitter was great, now we'll see how long these instances can survive...