Hmm. I'm not able to reproduce this in the IDE or in a reprex:
library(ggplot2)
ggplot(data = mpg) + geom_point(mapping = aes(x = displ, y = hwy))

Created on 2020-08-24 by the reprex package (v0.3.0.9001)
If it's working in R, but something's not working in the IDE, then it's probably an issue with your graphics device of some sort, and not ggplot itself. I'm going to move this to the #rstudio-ide category. If you could give info re. the version of the IDE you're running, that'd probably help whoever knows enough to dig into this with you (unfortunately, not me). 