The timing of the plot animation is built arount the plot$data$timestamp field, which is added in the plot_path function. If you didn't create your plot in this way, you can either add the field to the ggplot list data, or you can animate the path in a different way

animate_path(plt, ...)

Arguments

plt

Needs to have timestamp x value

...

Details

Calls transition_reveal from the gganimate package to plot the path, but