Instagram App Not Working on iPhone 11 Pro Max

I have been unable to log in to any Instagram account from the Instagram app on my iPhone 11 Pro Max for at least six months. I can access my accounts without any problem via Safari and the browser, but when I try to log in through the Instagram app on this device, it simply does not allow me to enter any account. I have already tried standard solutions such as reinstalling the application and similar basic steps, but the situation has not changed. Because I can log in from the browser but not from the app on this specific phone, I suspect that some kind of restriction or ban has been placed on my device for access via the app. I request that this possible device restriction be removed and that I be able to use the Instagram application normally again on my iPhone 11 Pro Max. I also expect a clear explanation of the reason for this situation and information on the steps taken to resolve it.