There are now 4 default simulated devices that you can test on:
You can also create new devices that match the characteristic of your users:
It's now possible to compare the experience of a user in Australia to that of a user in Finland. Or you can compare a test result from today to one from a year ago.
To do that, go to the Overview tab of one of the pages you want to compare and scroll down to the Compare section.
For example, this site is notably slower in Brazil than it is in the US:
Finally, a new documentation page takes an in-depth look at the Cumulative Layout Shift metric.