Again: assuming a government was able to legally compel PM to hand over all the information they had about a specific account, what would that set of info include?
It wouldn't include IP addresses or access times since PM supposedly doesn't keep logs of that information.
But it would include a lot of metadata. It would include addresses and timestamps of all non-deleted messages sent and received by that account, including other ProtonMail addresses.
It also would probably include the encrypted subject and body text of all non-deleted messages.