Create overlapping bar and line plot using ggpubr

[Mvula]

I am trying to make a overlaid plot, having 2 y-axes. I want one plot to be a bar plot, the other to be a line plot. I know how to do this in ggplot2 but I would like to learn how to do this using the ggpubr package. I'd be grateful for any insight anyone can provide! I know is is an elementary question, so thank you for bearing with me!

# Sample data
df1 <- data.frame(frax = c(16,30,60,64), solvb = c(0,0,100,100))
df2 <- data.frame(type = factor(c("mascot","mstat"), levels = c("mascot","mstat")), 
                 frax = c(30,35,40,45,50,55), phos = c(542,413,233,500,600,650))

This is what I'm looking for:

[williaml]

There is are a few examples of a secondary axis using sec.axis here:

Dual Y axis with R and ggplot2

[Mvula]

Thanks! I am trying to do this using ggpubr rather than ggplot2 though. I know ggpubr is based off ggplot2, so the solution should be somewhat similar, but I haven't been able to figure it out. That was a very clear and helpful link though! Will definitely share with my fellow grad students.