That's how create outlines works in InDesign.
My question for you is why are you creating outlines to begin with? If you deliver a high-res PDF the fonts will be embedded.
Years ago we routined converted to outlines in Illustrator to avoid type issues—for most people, it's no longer necessary, it's just a habit. Here's a doc from 2007 that addresses this.
This is one of those urban myths of publishing that you frequently need to outline fonts. The truth is that you should almost never have to outline fonts. Really only if you want to mess around with the glyph shapes for a special artistic effect. Unfortunately, it’s perpetuated by some print service providers and others who insist that they won’t receive a PDF file unless the fonts have been outlined. |
—https://indesignsecrets.com/outlining-fonts-is-it-necessary.php