Despite the Pokémon Company's best efforts, it might be impossible to stop Pokémon GO's declining popularity. The record-breaking game was a global phenomenon when it came out in 2016, and over the years, the Pokémon Company has worked with developer Niantic to introduce new events, mechanics, and updates to maintain the game's momentum. But after seven years, Pokémon GO's fan base has begun to wane, and it's unlikely the Pokémon Company can change that with Scarlet and Violet updates and Pokémon Sleep.
https://screenrant.com/pokemon-go-link-scarlet-violet-update/