The Sims 4 community is one of the most creative in gaming, but it is also one of the most volatile. Because the game receives frequent "patch" updates from EA, the complex code that mods rely on often breaks overnight. While many creators diligently update their work, some eventually step away from the community, leaving behind "fallen mods"—creations that are either broken, discontinued, or completely scrubbed from the internet.
Look into Lumpinou or Adeepindigo . They have taken the mantle of deep, functional gameplay overhauls. sims 4 all the fallen mods
If you are looking for a specific mod that has been deleted by the creator, the community has built several safety nets: The Sims 4 community is one of the