R ggplot2 label with math expression coming from a function variable [closed]

Question

I'm trying to create a function that plots an image based on a given data and label the image according to an input variable (which currently I have as a string). I would like to make the labels friendly to math expressions, but I'm running into trouble with that.

I tried to use functions like expression, parse or bquote and the best I managed was to:

1. make only symbols from plotmath work
2. get partial proper math formatting (see example for sub- and superscripts - I couldn't put the subscript for the 1 without printing parenthesis as well, but I didn't research much on that)

library(ggplot2)

myFunc <- function(givenData,myString){
    myplot <- ggplot(givenData, aes(x = x, y = y)) +
      geom_point() +
      labs(title = bquote("My plot for" ~ .(parse(text = myString)[[1]])), x = "", y = "") 
    
    print(myplot)
}

df <- data.frame(
  x = c(1, 2, 3, 4, 5),
  y = c(2, 3, 4, 5, 6)
)

myFunc(df,myString = "text >= (1^2)[3]")
myFunc(df,myString = "`text with spaces`")
myFunc(df,myString = "`testing text \u2192`")

(With those functions I also tried to change myString into a function output instead of a string, but I didn't get anywhere with that.)

I also tried to use simple unicode instead, which achieves:

1. all unicode symbols appear
2. however I lose the math formatting capability

library(ggplot2)

mysecFunc <- function(givenData,myString){
    myplot <- ggplot(givenData, aes(x = x, y = y)) +
      geom_point() +
      labs(title = paste("My plot for", myString), x = "", y = "") 
    
    print(myplot)
}

df <- data.frame(
  x = c(1, 2, 3, 4, 5),
  y = c(2, 3, 4, 5, 6)
)

mysecFunc(df,myString = "text >= 1^2[3]")
mysecFunc(df,myString = "text with spaces")
mysecFunc(df,myString = "testing text \u2192")

How can I pass the myString argument in such a way that math expressions are properly treated? I want to 0. have a prefix text inside my function (the "My plot for" in the mwes)

1. be able to use any unicode character, not only those from plotmath 1.optional be able to use latex expressions would be even better
2. be able to do math formatting like sub- and superscripts

If relevant, I'm writing this all in R chunks inside a quarto document in RStudio for windows. I didn't do any testing regarding the rendering, but I would also like to: 3. have the resulting plot label be rendered correctly (for example, in html output)

I guess I can go around 3 by saving the plots as an image, but it would be nice to not have to do so. I use ggplot2 because in my actual use the function will be producing a heatmap rather than a simple plot.

All questions related to labeling that I could find did not translate well to the function case with an inbuilt prefix. Related but unsolved question: ggplot2 custom facet labeller with math notation