Here is a partial solution for non-beamed individual tailed notes.
In Write mode, select the note, add an interval and then use alt-up/down arrow to move the new notehead to make a unison.
In Engrave mode, select only the notehead on the “correct” side of the stem. In Properties panel > Common > Custom scale, enter the value of 1. The selected notehead will effectively disappear. Because it has greatly decreased in size but it still attached to the stem, it has “moved” closer to the stem and is now obscured by the normal-size notehead.
For the notes that are on a space, there is a very small gap between the notehead and the start of the stem. This is because the placement of the stem is based on there being two notes attached to it, and the other note, if it was still normal size, would cover up that gap. At normal viewing size and when printed, the gap might not be noticeable unless you know to look for it. For notes on a line, including on leger lines, the line covers the gap.
There is no way of flipping the tail from the right-hand side of the stem to the left to give a complete mirror image of a “normal” note. The tail always stays attached on the right-hand side of the stem.
To clear the tail from the notehead, you can drag the end of the stem in Engrave mode, as I described in the previous post.
