Sorry to hear that you have trouble with this situation. Since your files remain visible at OneDrive.com, they have not been lost. Uninstalling OneDrive only stops synchronization; it does not delete cloud data. Reinstall OneDrive, open it from the Start menu, and sign in with the same Microsoft account. During setup, accept the previous/default OneDrive folder and select Use this folder if prompted.
Your files should then appear under OneDrive – Personal in File Explorer. If some folders remain missing, open the cloud icon > Settings > Account > Choose folders and select them. To download them physically to the PC, right-click the required folder and choose Always keep on this device.