There is a Lewis Moore with no birth or death dates buried at Leavenworth National Cemetery. https://www.leavenworthcounty.gov/cemeterydb.asp
When I went to findagrave.com it appears that this person died much later than the Civil War.
Fort Leavenworth has its own cemetery, so logic says that he would have been buried there, but there is no record of the burial.
Dear Mr. Hollenbeck,
Thank you for posting your request on History Hub!
We have searched the National Archives Catalog and located the record series Record of Headstone Contracts and U.S. Soldier’s Burials, 1861-1903 and Burial Registers of Military Posts and National Cemeteries, ca. 1862 - ca. 1960 in the Records of the Office of the Quartermaster General (Record Group 92) that may contain information that you seek. For access to these series, please contact the National Archives at Washington, DC - Textual Reference (RDT1) via email at email@example.com.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from RDT1. We apologize for this inconvenience and appreciate your understanding and patience.
You also may wish to contact the Fort Leavenworth National Cemetery for information on interned Union soldiers who died during the Civil War. You may contact them using the Department of Veterans Affairs website.
We hope this is helpful. Best of luck with your research!