The Steam Workshop is inaccessible. You can manually download mods from third-party sites, but many mods require the latest official patch (v1.12.1+). The SteamPunks release is usually 2–3 patches behind.
Searching for "Total War Warhammer II SteamPunks Full" exposes you to three real dangers:
If you legally own Total War: Warhammer II on Steam but don’t want to pay $100+ for DLC, the community uses a tool called CreamAPI. This is not a full crack—it is an AutoHotkey/API wrapper that unlocks DLC you already have on your hard drive (CA downloads all DLC assets to everyone’s PC for multiplayer compatibility).
Note: Using CreamAPI violates Steam’s ToS, but it is the “SteamPunks” method of choice for getting a “full” roster without a complete crack.