iPhone for elderly neighbor (Capitol Hill)

This is a big ask. It is once again for my elderly neighbor who is low income and lives alone. Her iPhone 8+ is about to become obsolete and so she needs to get a newer model. She has the 8+ because it has a larger screen that helps her see the keyboard. Her mobile carrier does not have any promos for phone upgrades for existing customers. She is not familiar with Androids and thus is afraid to use one, so I just thought I would ask if anyone happens to have a large screen iPhone that is collecting dust and could use a new home. It can be many years old as long as it is still supported by Apple.

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