For the iPhone 13 mini and iPhone 13, Apple has doubled the base storage configuration from 64GB to 128GB. This means the iPhone 13 is available in 128GB, 256GB, and 512GB configurations.
That 128GB of base storage should be enough for ... you’re getting either an A15 chip (iPhone SE 3, iPhone13, iPhone 14, and iPhone 14 Plus), an A16 chip (iPhone 15 and iPhone 15 Plus ...