iPhone SE (3rd generation, 2022): The latest SE model also featured the (PRODUCT)RED color. iPhone 14 and 14 Plus (2022): The final iPhones offered as part of the PRODUCT)RED line.

It is definitely not an iPhone 15 Plus, but beyond what can be visually determined, there is no information. It could, of course, be the (PRODUCT)RED iPhone 14. That would be mean, though.

One suggestion is that the company will introduce at least one new colour for the iPhone 13. The iPhone 11 Pro came in black, green, red, purple, white and yellow.

iPhone SE (3rd generation, 2022): The latest SE model also featured the (PRODUCT)RED color. iPhone 14 and 14 Plus (2022): The final iPhones offered as part of the PRODUCT)RED line.