Since build 26200 is on the 25H2 branch, and 25H2 has already shipped publicly, you're in the easier case — a Beta/Release Preview channel device can usually just unenroll and settle back once Windows Update syncs, no reinstall needed. Try the toggle first.
Go to microsoft.com/software-download/windows11 and download the Windows 11 disk image (ISO), making sure you select an edition matching Home. Double-click the downloaded ISO to mount it as a virtual drive.
On the mounted ISO drive, run setup.exe. When prompted, choose "Keep personal files and apps." This performs a repair install that replaces your Insider build with the stable retail Home build, without wiping your data — similar to a clean reinstall under the hood, but non-destructive.
After it finishes and restarts, go to Settings > System > About to confirm the edition reads "Windows 11 Home" and the build number matches a public 25H2 release, and check Windows Insider Program settings to confirm you're no longer enrolled.