If you prefer not to build your own, the community frequently shares pre-made packs. Popular options include the 1998 Retro Pack
You can easily import community-created data packs by pasting a shareable link in the game's menu, giving you access to historical seasons (like a 2011 retro pack) or updated modern rosters. world soccer champs data pack editor
: Extract your downloaded custom data pack files directly into the game's files directory, choosing to "Overwrite" or "Replace" all existing files when prompted. If you prefer not to build your own,