How to export a flextable table from r as a good quality interactive table

Question

I have this dataframe

df = data.frame(x = 1:20, y = 2:21, z = 3:22)

and when applying flextable and exporting the image I have this result :

flextable(df)

I don't know how to export it as a complete table, interactive and in a good quality.

would appreciate the help.