Text.ToList Function in Power Query
The Text.ToList function returns a list of characters from the given text value.
Syntax
 Text.ToList(text as text) as list 
Example: Create a list of character values from the text "Ashish Goel".
Power Query M
let
    Source = Text.ToList("Ashish Goel")
in
    Source The output of the above formula is shown below:
Output
{
    "A",
    "s",
    "h",
    "i",
    "s",
    "h",
    " ",
    "G",
    "o",
    "e",
    "l"
} 