There is raiding. There are normal raids (the eden raid for this expansion), there's savage raids (the hardcore version of Eden, basically THE endgame content), there is alliance raids (nier raids for this expac). Normal and alliance can be completed blind, savage will take practice.

Gear wise, you get stopgap gear with eden normal and nier raids while building up phantasmagoria tomestones and completing savage raids for the best gear.

You don't have to do savage though, most don't. There are also beast tribes (only fairies atm, more will be added in future patches), more trials will come in future patches, ex trials if you want something more challenging that isn't savage, etc

You could get into crafting, that's a big time spender even if its less so now.

You can also go back to older content you may not have done yet. Raids, optional trials, etc. Maybe do an older relic weapon (shadowbringer's relic weapon series will probably start next major patch).