Erasing a 2019 iMac with Intel chip - did I miss something?

I just purchased a new iMac with the M4 chip. Moving from a 2019 21.5" iMac with an Intel chip. The migration was seamless, as expected.

So I went to erase the old iMac so I can give it to a friend. I couldn't use the newer "Erase" option in system settings since this is an older iMac. So I did it the old way after searching around here in the forums. Things seem to have gone fine. I followed the steps in the attached screenshot. When that was finished, I restarted, and reinstalled Sequoia (second option) as per the instructions.

So at this point I thought I would see the "Hello" screen. Instead, I see the "Select Your Country or Region" screen. Did I miss something? I just want to make sure everything was erased, and it is ready to go for my friend before I send this out to him.