How to open Ya.Maps from Android / iOS to build a route?

Question

Yandex maps

Tell me how to open Ya.Maps from another application (html + js) through a link to build a route from the current point?
Basicly throw a route in Ya.Maps: point "A" → point "B" - there are no problems with this. Everything is described here:
https://tech.yandex.ru/yandex-apps-launch/maps/doc...
But how to build a complex route with auto-detection of the current point?
Those. something like this: point "Current" → point "A" → point "B".