Hi Kailyn,
I'm Ramesh, here to answer your query at the Microsoft Community.
Please use the Windows 11 ISO to upgrade to 23H2. The instructions are in the following community article.
How to run In-place upgrade in Windows 11 - Microsoft Community:
https://answers.microsoft.com/en-us/windows/for...
Your apps, settings, and files will be kept by default during a repair install/in-place upgrade.
Note: If you see the following screen (with grayed-out options), abort the setup and post the screenshot of that dialog here. This issue can occur if you use a different language ISO.