According to the News of Taiwan's Economic Daily on February 13, Apple has begun mass production of the iPhone SE3 and is likely to be listed in mid-to-late March.

According to Apple's plan, a spring conference will be held in March this year, and the iPhone SE3 is the protagonist of this conference. After a period of breaking news, the relevant configuration of the machine is also basically released, it will be equipped with the same IPhone13 A15 six-core processor, compared with the original A13 processor, the performance will be greatly improved.
(from the Web)
In terms of appearance, the iPhone SE3 should be consistent with the previous generation, but it will support 5G networks. At the same time, due to the main cost performance of the iPhone SE series, there is news that the starting price of the new machine (3299 yuan) and the previous generation will be the same, in addition, due to the exchange rate, the starting price of the National Bank version may be lower.