Sorry to hear that Lightroom Mobile is not reading RAW files. We're here to help.
Which version of Android and Lightroom Mobile are you using? How much free storage space do we have?
Can you import JPEGs? How are you importing the RAW files?
Check this article for some troubleshooting steps: https://helpx.adobe.com/lightroom-cc/kb/unable-to-import-raw-android.html.
Let us know if this helps.