Not quite in time for the corresponding Go updates, but close enough. The Sinnoh entries have been updated to reflect new information revealed in USUM.
Regarding Pokémon Let's Go, the entries seem to be lifted from Pokémon Yellow. Meltan and Melmeltan will get entries as they are new Pokémon, but the rest of the Kanto species should not have much to add save for a few minor details here and there.
For those of you in America, have a Happy Thanksgiving! Fittingly enough, Unova is coming next!
- The World of Pokemon