How flipping works
There is no “upside down” setting in Unicode. Instead, each letter is swapped for a character that looks like it rotated, such as ɐ for a and ǝ for e, and the order is reversed so it reads correctly when turned around. A few capitals and digits borrow look-alikes from other alphabets.
Use it with care
Screen readers may read these characters strangely or skip them, and search won’t match them to normal words. Keep the important words, like your name or your shop name, in plain text somewhere too. Very old devices may show empty boxes.