Generally, FPS games tend to age poorly as hardware evolves, leaving you with heightened expectations for how these games will perform why would anyone consider an upgrade to a new phone for gaming if those titles only play with the same graphics settings at a capped out performance that your old phone can handle? Call of Duty Mobile never suffered from this issue.
The game has already packed a few years on it, but it is still going strong. You can't argue that Call of Duty Mobile is leading the pack as one of the best FPS games on Android it has reached over 500 million downloads since its release in 2019.