stat_summary text location relative to each boxplot in ggplot

Here's one potential solution calculating the relative position beforehand, noting that the boxplot shows the median, and you are calculating/printing the mean and sd in your code:

library(tidyverse)
data.boxplot %
  groupby(Component, Label) %>%
  mutate(bottomlimit = boxplot.stats(Score)[[1]][1] - 1,
         labels = paste(
           "M =", round(mean(Score), 2), "\n",
           "SD =", round(sd(Score), 2), "\n")) %>%
  ungroup() %>%
  ggplot(aes(x = Component, y = Score, fill = Label)) +
  geomboxplot(outliers = FALSE) +
  scalefillmanual(values = c("#FF5F1F", "#1FC0FF")) +
  statsummary(geom = "text", aes(y = bottomlimit, x = Component, label = labels),
               vjust = 1, position = positiondodge(width = 0.8)) +
  themeclassic() +
  scaleycontinuous(limits = c(0, 100),
                     expand = expansion(mult = c(0, 0)))
#> No summary function supplied, defaulting to meanse()

^{Created on 2026-03-18 with reprex v2.1.1.9000}