Rectangling data: special cases

df_unnamed_heterogeneous |> unnest_longer(y)

## # A tibble: 4 × 2
##   x     y        
##   <chr> <list>   
## 1 a     <dbl [1]>
## 2 b     <chr [1]>
## 3 b     <lgl [1]>
## 4 b     <dbl [1]>