Many The Sims 4 players participate in legitimate modding communities that offer free custom content (CC) and mods that add new gameplay features without bypassing paid DLC. These are completely legal and supported by EA. For those committed to using the unlocker, resources such as cs.rin.ru (the RIN forum) provide discussion threads and technical support.
If you use a DLC Downloader tool, point it to your game folder, and it will automate this process. Step 4: Run the Game ea dlc unlocker v2 sims 4 full