These are already decrypted. They do not require title keys.
There is often a search for a "full list" of keys. Because the Wii U eShop has been officially closed, the era of new keys being generated has ended. However, a "full list" would imply a database of keys for every game ever released. Distributing such a list is a clear violation of the Digital Millennium Copyright Act (DMCA) and similar international laws, as it acts as a master key for unauthorized access to copyrighted software. cemu wii u title keys full
If the file doesn't exist, create a new text document and name it keys.txt . These are already decrypted