Variable scoping issue with .data inside lambda Ffunction used in across() about dplyr HOT 2 OPEN

iris |>
  group_nest(Species) |>
  mutate(boo = map(data, function(x) {
    colsym <- sym("Sepal.Length")
    x %>% mutate(newcol =! !colsym)
  }))
# Error: object 'colsym' not found

iris |>
  group_nest(Species) |>
  mutate(boo = map(data, function(x) {
    colname <- "Sepal.Length"
    x %>% mutate(uncle=.data[[colname]])
  }))

helper <- \(x) {
  colsym <- sym("Sepal.Length")
  x %>% mutate(newcol=!!colsym)
}

iris |>
  group_nest(Species) |>
  mutate(data = map(data, helper))

quos(\(x) {bee <- colsym::sym("a"); mutate(x, newcol=!!colsym)})