Is there are way to modify a footnote style to leave a space between the footnote number and the text?

I’ve defined a style called “Book Footnote” to format my footnotes. Even when I manually insert a space between the footnote number and the text, LO removes the space when I save my document. How can I make it leave a space between the number and the text?

I found that, using Tools> Footnotes/Endnotes, I could format the footnotes to give me a space between the number and the text.