You will not get a 1099 in the mail, but it will be reported to the IRS and will trigger an IRS notice if it isn’t on your return.
https://www.wsj.com/personal-finance/taxes/i-bonds-taxes-1099-form-2023-guide-6f206ccb?mod=mhp
The 1099 info is on the treasury direct website - Just like most banks...
What is a problem is when investment banks like Etrade forget to include Tbill info on their 1099 - Here is a message from E-Trade chat "Thank you for your patience! This issue has been reported. We will be reissuing corrected forms inclusive of the missing Treasury bills on or about February 27th. I sincerely apologize for the inconvenience."
Seems like E-trade has a record of messing up on their 1099s!
As Ric Edelman has always warned his listeners on radio - "Don't Rush to file" Investment banks are always making amendments and you dont want to have to file an amended return. (well, your accountant may W$nt to!)