Not in the same sense as a camera RAW file. Camera RAW contains sensor data that still needs demosaicing/interpolation, while a scanner already captures a complete image.

What you likely want is a higher-quality, less-processed scan for editing. The best approach is to scan to a high bit-depth, lossless format such as TIFF rather than JPEG. That preserves more tonal information and avoids JPEG compression losses when you retouch.

Some scanner software, such as VueScan, offers a “RAW” option, but for scanners this is essentially a minimally processed scan saved in a TIFF-like form, not a true camera-style RAW.

Also, Lightroom can edit JPEGs as well as other formats, so you do not need RAW just to use Lightroom. If possible, scan the photo as TIFF with minimal corrections in the scanner software, then do your main adjustments in Lightroom. If you must start from JPEG, you can still edit it in Lightroom, but avoid repeated JPEG re-saving; export your final edited version in a lossless format if you want to preserve quality.