Manually highlighting a section of a time series with ggplot

Question

I have a ggplot geom_bar plot for a time series. I want to highlight the section from 11:00 to 19:00 with a rectangle.

Here is an image of the base graph and my attempt at a solution

ggplot(solution, aes(x = as.POSIXct(timeStamp, origin = "1970-01-01", 
                                    tz = "GMT-7"), y = as.integer(timeLength)/60, fill = running)) +
  geom_bar(stat = "identity") +
  xlab("")

y_max = (as.integer(solution$timeLength)/60) %>% max
y_min = 0

df_highlight <- solution %>%
  #filter(hour %in% c(1,2,3,4,5,6)) %>%
  group_by(date) %>%
  summarise(xmin = as.POSIXct("02-02-2022 11:00:00.0", origin = "1970-01-01", 
                              tz = "GMT-7"), 
            xmax = as.POSIXct("02-02-2022 19:00:00.0", origin = "1970-01-01", 
                              tz = "GMT-7"))