Planner Plan 1 features missing

Richardb135 I worked out the problem on my side.

It was a misunderstanding. I was expecting those features to switch on for my existing plans.

That's not the case. You have to either create or convert a plan into a project before you see those features.

It's not clearly communicated but now I've done it, it seems obvious in hindsight.

1. In the left-hand toolbar of Teams, go to the ...
2. Add Planner
3. From planner interface in the top-right, select + New plan
4. In the interface  you should see an option for 'Premium'
5. You can select a template for testing (I chose Software Development) and it gives you two options: Basic, and Premium.
6. Premium is the option that gives you timelines and such.
7. It took ages for the first project I was playing with to get up and running, and I had to restart Teams to view it.
8. But now it's there and all the functionality is present.

Additionally, in the browser app, I think there's an option for importing an existing plan as a premium plan. That's how I found the pathway to get this working.

Not sure if that'll solve the problem for you, but solved it for me.