Yuya Takahashi has vanished from the face of the Earth since the Broly movie. No word on what he's up to.
Following the conclusion of the Super anime, Osamu Ishikawa moved over to Hugtto! Precure, proving key animation in Episode 17 and 30. Following the conclusion of Hugtto! Precure, Ishikawa's current whereabouts are unknown.
Koji Nashizawa worked One Piece, serving as Key Animator in Episode 856, and then worked on the DBS Broly movie following that. Just like Ishikawa, Nashizawa moved over to Hugtto! Precure, providing Key Animation in Episode 17 and 28, and hasn't worked on any projects since the end of Hugtto! Precure.
After the finale of Super, Shida worked on DBS Broly where he produced some his finest work:
Ryo Onishi excelled his already quite high standards after the Super TV anime ended with some spectacular animation in DBS Broly. Producing not just the finest parts in the movie, or even the finest cut in an animated Dragon Ball product, but one of the finest pieces of battle choreography you'll see in any animated movie for MANY years.
Seizo Toma has done next to nothing since his last contribution in Episode 55 of Super.
Miyako Tsuji, who served as Chief Animation Director for roughly 40 episodes, worked on Dragon Ball Super Broly as Assistant Animation Director and then moved to Super Dragon Ball Heroes.
Takeo Ide, who also served as Chief Animation Director for roughly 50 episodes, also worked on Dragon Ball Super Broly as Assistant Animation Director. And then worked on an episode of One Piece. Hasn't worked on anything since.
Ken Otsuka did some key animation Dragon Ball Super Broly and season 2 of Mob Psycho 100 (in the finale no less!) after the Super TV anime ended.
Following his last episode in the Super TV anime (#129), Hirotaka Nii worked on Season 3 of My Hero Academia and then DBS Broly. Hasn't worked on anything since.
So here is a basic rundown of the what has happened to the big players of Dragon Ball Super's animation staff since the end of the anime:
Naotoshi Shida: Super TV anime -> Dragon Ball Super Broly -> GeGeGe no Kitarō (2018) -> Super Dragon Ball Heroes
Ryo Onishi: Super TV anime -> Dragon Ball Super Broly -> ?
Naoki Tate: Super TV anime -> Mirai -> Dragon Ball Super Broly -> ?
Shuuichiro Manabe: Super TV anime -> Dragon Ball Super Broly -> ?
Yuya Takahashi: Super TV anime -> Dragon Ball Super Broly -> ?
Hiroyuki Itai: Super TV anime -> Dragon Ball Super Broly -> ?
Atsushi Nikaido: Super TV anime -> Dragon Ball Super Broly -> ?
Yoshitaka Yashima: Super TV anime -> GeGeGe no Kitarō (2018)
Futoshi Higashide: Super TV anime -> Dragon Ball Super Broly -> Golden Kamuy -> GeGeGe no Kitarō (2018)
Yuichi Karasawa: Super TV anime -> Dragon Ball Super Broly -> GeGeGe no Kitarō (2018)
Hirotaka Nii: Super TV anime -> My Hero Academia -> DBS Broly -> ?
Yoshitaka Yashima: Super TV anime -> GeGeGe no Kitarō (2018)
Kenji Miuma: Super TV anime -> Hugtto! Precure -> ?
Koji Nashizawa: Super TV anime -> Dragon Ball Super Broly -> One Piece -> Hugtto! Precure -> ?
Miyako Tsuji: Super TV anime -> Dragon Ball Super Broly -> Super Dragon Ball Heroes
Takeo Ide: Super TV anime -> One Piece -> ?
Ken Otsuka: Super TV anime -> Dragon Ball Super Broly -> Mob Psycho 100 -> ?
Seizo Toma: Super TV anime -> ?