I have change my main workspace view and I cant see how to get to sync settings

On the new homepage, click on "All workspaces" in the top left:

Then, click on the three dots on whichever workspace you want to access the workspace settings:

Thanks matthew! do you know wich level of permission do I need to have on thw workspace?

I'm not 100% sure, but you might have to be an Owner to be able to access those settings.