Looks I am a bit late to this but the official schedule is out via Gematsu and Siliconera and GameInformer. It will be an online event again on YouTube.
The Keynote and theme on Sep 30 “We’ll Always have Games” I am interested in what the smaller companies such as Level 5 and Atlus are up to if they are going to show up.
Previous TGS 2020 via Siliconera
Tokyo Game Show 2021 Will Be Held from September 30 to October 3, 2021
CG BOSS - Anime & Games Storyworlds 