Format dates with highcharter

Question

I can't figure out the dates formatting when using the package 'highcharter'. In the chart below, I want the date to be expressed as 15-12-2022 both in the tooltip and on the axis. I can't remove the date in whole letters at the top of the tooltip and also can't change the format of the X axis. Here is my code:

plot<-hchart(dataset ,'column',hcaes(x = Date, y = Variable)) %>% 
  hc_xAxis(dateTimeLabelFormats = list(day = '%d-%m-%Y')) %>% 
  hc_tooltip(pointFormat = "{point.x:%d-%m-%Y} <br> Variable: {point.y} ")