So in the epic preview, we see the tool that allows fighters to form "wings" of a leader and 2-5 other fighters of the same type. (also a few faction specific "special ship and escort" wings, like Trench Run Vader escored by /LNs)
However, we have not seen any restrictions on WHICH slots on the template have to be filled with the Leader, which are filled with wingmen, and which is left empty.
When flying as a wing, the wing leader executes maneuvers normally and their wingmates fo
Here it is:
On the top center. If it's two, they just go on either side. Third goes behind. I imagine four would double up on both sides, and, well, they show what five looks like. So it's pretty clear.
Of note: The Silencer can only be escorted by two or three TIE fighters, not a full five. Of course, I don't know why one would want to pay for that many (to keep SR Kylo alive I guess?) but it'll look just like Kylo and his wingmen in TLJ, which is pretty... well, epic. Incidental