I am all blushing and smiling Thank you for your comments on my threads.
As per stitches around the neck, there are a few things that were discovered experimentally Say, I always do the 'slip first and purl last' edge stitch on all edges even for the neck line. However, sometimes it's better to knit the last to make this long stitch, not the twisted one. So the whole edge looks like a chain, like an edge stitch. Sorry, if it's confusing, I think I should make a video at some point
So usually, when picking up stitches I go under this edge stitch, leaving both loops on the wrong side. And I pick as many stitches as there are loops, that's it.
But just a few days ago I discovered a secret, sort of "reverse engineered" it from the sweater someone made for me as I was frogging it to make, ahem, a lilac sweater. It also had the same round "roll type" collar made with stockinette stitch (please, insert the proper name for it in the comments)
So, the stitches were picked up through the edge stitch, leaving one loop on the right side and one on the wrong side. So loop on the right side serves as 'padding' and leaves no holes, and the one on the wrong side looks like a line and doesn't stick out.