Lost emails.

My wife and I both have Comcast emails. We both  lost all emails dating before July 16, 2024. I also have an Apple laptop, which did not experience email losses. My wife only uses her iPad or phone for emails. She is quite upset.  How can I restore those lost emails?  The lost emails are not in the trash or spam folders. I searched for a particular email I knew I had seen, but it was gone, There were no lost emails on the server.