Reference to a waypoint on a Touying slide

Questions
1

Does anyone know how to add a link to a waypoint on a Touying slide? Given a slide

== Slide 1 <myslide1>

This is a slide with waypoints

#waypoint(<start>)
-Start
#waypoint(<middle>)
- Middle 1
- Middle 2
#waypoint(<end>)
- End

I would like to “jump” to this slide from another slide but to a specific waypoint like this

== Slide x <myslidex>
Ready to jump? #link(<myslide1.middle>), "Here you go")

but that doesn’t seem to work (the label does not exist).