Change date format in R from: "Year-Month" to "Year-Month-Day"

Question

I have an existing column that has "dates" in character format.

How can I alter my existing data frame coloumn so from: 2022-12 to 2022-12-01

• 2022-12 (Year-Month in class character) to 2022-12-01 (Year-Month-Day in class Date)

I have tired using the as.Date function but I have been unsuccessful.