Back in June Google said you will be able to add Google Posts directly from the Google search results page. I suspect that went live shortly after the announcement on mobile and maybe desktop, but maybe it didn't and I missed it. It may or may not be new but I wanted to cover that you can now add Google Posts from Google Search.
Thibault Adda pinged me about this on Twitter saying "You can now create a GMB Post directly from the search results." So I tried it myself for a business profile I manage by searching for its name and presto, there is an "add update" button above the Google Posts section of the local knowledge panel:
Then a form overlays the search results page for you to add the details:
Again, this may not be super new but here is that heads up:
Forum discussion at Twitter.
Note: This was pre-written and scheduled to be posted today, I am currently offline for Rosh Hashanah.