Event+select (persistent selections with shift key) on mobile devices


I am using clickmode="event+select" to select multiple countries by clicking on a choropleth map while pressing the shift key. How could I make this work on mobile devices (without keyboard) ?

Could I convert a tap with two fingers JS event to a shift + key event or something like this ? I’ve been looking for more straightforward options using dash but haven’t found any.

Thanks in advance for your help.