The roundabout is open as of today (
https://www.penndot.gov/RegionalOffices/district-8/pages/details.aspx?newsid=1545).
I am hoping to drive it tomorrow before putting the update in here. This may be a test run to see if I will let myself drive to Pittsburgh next weekend with the cosmetic damage to the bottom of my car having not been fixed yet.
EDIT: The roundabout as shown in OSM would not require an update here. I will make a determination on whether I want to add Snyder Hill Rd (SnyHillRd) to cover PA 850's slight realignment tomorrow.
EDIT (10-23-2021): I decided after field checking that roundabout that SnyHillRd is not needed on PA 850. So I have no updates here, but I did other minor revisions to PA 34 (
https://github.com/TravelMapping/HighwayData/pull/5246).