As far as new stuff, they are trying to deploy some simulated satellites from the second stage and will try to relight one of the engines.
First 10mins watching gets you to space with engine shutdown.
38mins after launch engine turns back on. 10mins after that reentry starts. 1:06 after launch is the landing.
I think that covers it.
Edit: also, they are reflying one of the raptor engines that was on the previous flight (Engine 314, because pi).
Literally just lofted some satellites.
SpaceX is an extremely successful space launch company, and Falcon 9 is the best we've ever had. It's just Starship that seems to be going much worse.
Starship has already demonstrated several key things work - the new engines, catching the booster, and on-target intact reentry of the second stage, all for about as much money as a single SLS launch is projected to cost. (Thus far, they've only had one for $26B.)