It looks as though your y axis isn't numeric.
Notice the differences here:
library(tidyverse)
tibble(x = c("1", "33", "100"),
y = c(1,2,3)) |>
ggplot(aes(y = y, x = x)) +
geom_point()

tibble(x = c("1", "33", "100"),
y = c(1,2,3)) |>
mutate(x = as.numeric(x)) |>
ggplot(aes(y = y, x = x)) +
geom_point()

Created on 2022-01-22 by the reprex package (v2.0.1)