Font size discrepancy in saved plot using ggsave: nested axis text size not change after saving

[SyedTuhinAli]

p= ggplot(df,
aes(x = interaction(comb_spp, comb_treat), y = LMF)) +
geom_boxplot(aes(fill = comb_spp)) +
scale_x_discrete(guide = guide_axis_nested(delim = ".")) +
theme(ggh4x.axis.nesttext.x = element_text(size = 16))

works on the R output plot however after saving ggsave("output.jpeg", p, width = 12, height = 8, dpi= 300) the nested x axis text size is no longer 16.

[teunbrand]

Does all other text scale just fine? I just quickly tried the first example in ?guide_axis_nested with size = 16, but it doesn't look off to my eyes.

[SyedTuhinAli]

well in the r Plots, it does change, however, whenever saved as jpeg or png, other than pdf, it does not change. could you please check it again?

[teunbrand]

Yeah I checked by saving as jpeg, this is what it looks like on my end:

[SyedTuhinAli]

yes, it is working. thanks. I had to increase the size quite a bit, for example, 40.