The heptarchy as described here is an oversimplification. There were other kingdoms at times, like Lindsey and Surrey, and not all of these were in existence all the time either.
The name Heptarchy was coined in the 12th century by Henry of Huntingdon, long after the so-called Heptarchy was a thing. He oversimplified the situation. At no point in Anglo-Saxon history was there just seven polities that we might call kingdoms.
well I had no idea what was even being asked, Once wessex was right, I ended up getting 4. (first tried wales etc, then hibernnia, anglia, cumbria and all sorts of latin names for the region, names of clans like the picts. I really didnt know what you/I was looking for)
I really hope there was a time in history where some combination of Essex, Wessex, and Sussex went to war, and that historians refer to this as "The Battle of the Sexes."