Aside from the perfect match of date of registration down to the minute,
1. We can see the ghost of a "G" under the censored username
2. He made
717 forum-counted posts since he made the screenshot on 16 April, 2023 [36 pages of 20 posts each, minus three posts made before the screenshot], which matched his current post count.
3. His merit count matched the profile [549 up to April, given his
550th merit happened on 09 June]
I just want to add, just in case Google+ might counter that someone just took a screenshot of his profile info. if you check the "additional information" at the bottom of the profile, you won't see the "Send this member a personal message." which tells you that the screenshot was made by whoever logged in to that account. the "Send this member a personal message." is only shown if you are visiting someone else's profile account(at least as far as I know).