Sent Items Gone From Before 20 July 2026

I have lost all Sent emails from one Hotmail account from before 20/07/26. I have checked 2 other Hotmail accounts and the problem is not there, all my Sent items are present.

I have checked Rules, checked outlook.com and the phone app but all are the same, nothing before 20th July.

I have done some research online as to why this has happened and a few other people appear to have had this problem this year.

Someone I sent an email to last year, her address came up when I searched for her, but the email itself is gone. This is how I found out about the problem.

Any way to get these back?