How to especify no NA omit?

Greetings.
A while ago I was using plotly for an application I am developing to display climatological time series.
The problem I’m having is that while my data has a lot of gaps at the beginning, this is not reflected in my plotly series. I would like to know how I can prevent this from being omitted, bc I require the complete series to be displayed, showing the large amount of gaps at the beginning of the series.

This is an extract of my code and the graphic example:

        output[[series]] <- renderPlotly({
          plot_ly(data = df_sin_, x = ~Fecha, y = ~.data[[colnames(df_sin_)[i]]], type = 'scatter', mode = 'lines', 
                  name = colnames(df_sin_)[i],
                  color = I(color_base)) %>%
            layout(title = "Serie temporal",
                   xaxis = list(title = "",
                                rangeslider = list(type = "date")),
                   yaxis = list(title = ""),
                   hovermode = "closest") %>%
            config(displayModeBar = 'hover', 
                   modeBarButtonsToRemove = c('toImage', 'zoomIn', 'zoomOut', 'resetScale', 'pan2d'),
                   displaylogo = FALSE) %>%
            config(hovermode = 'compare')
        })

Maybe helpful: