Older email disappeared

Oh wow I appreciate your knowledge you just taught me something I didn’t know you could do that I never knew you can check your emails of iCloud through your browser and I consider my self an iPhone professional 😂😂😂 yea they do show up but I still find it kinda of weird how they showed up when I went through the browser but not through the app,,thank you 👍

Ok so maybe the photos that are part of the email don’t show up because they were deleted from the websites server but I still can’t figure out for example email through 2/10/2013 - 11/20/2012 won’t come up no matter how many time I refresh the email app but emails that would be older then 2012 would still be there and this started to happen when I bought the iPhone 12 max on all my other iPhone all of my emails were always there no matter how old there were and the weirdest part is that it would just be through a certain amount of dates then even older one would still be there

iCloud the email app that come with the iPhone I have about 12000 emails dating back to 2009 but the ones for example from the dates of 2/19/2016-6/13/2012 are all gone and I haven’t deleted them they were always there in all my other phones and no Matter how many time I refresh the app or log in and out of my iCloud account or even factory reset my phone they still won’t be there but all the others would download except those I even messed around with the fetch setting and stuff and still nothing it’s the weirdest thing I ever came across since the very first time I’ve owned a iPhone so I’m starting to think maybe it’s just this specific phone I didn’t buy the 13 but I’m going to get the 14 and Im hoping that it’s just this phone I was even thinking that maybe someone hacked my sever or IP address and deleted them in a way that it would show me or I wouldn’t find out if that is even possible but I doubt that and I don’t know how to look at email through the Apple website I tried but I don’t think you could do that