Two Note-anchored line

I would like to draw a line between notes to designate the continuity of a melodic line. This might go across staves or other voices, etc. (see attached screenshot)

I see a line under "Lines" which is adjustable on both ends, but it is not anchored on either end to a note, just to a space on the stave. These lines get messed up easily when the spacing changes, so I've had to redraw them every time.

I see lines under Arpeggios, which anchor to one note either at the beginning or the end of the line, but not both ends. However, this starts a little to the side of the note (not always what I need) and it doesn't allow other notes to fall between the ends, so the measure spaces out to fit the line.

Is there a line that anchors on either end to two different notes and will follow those notes wherever they end up in the formatting?

Thank you.