They are “ad extension scheduling control” and “shared libraries for Call Extension and Location Extension.”
Control delivery of your ad extensions
On Bing Ads Editor, advertisers can now control the date range, days of the week, and time of the day of when your ad extensions are displayed. The schedules can be based on your account time zone or the time zone of the person viewing your ads.
Efficiently manage Call and Location Extensions
There were improvements on the shared library of Bing Ads Editor. Now you can add Call and Location Extensions, and then associate the same extensions to multiple campaigns.
If you modify this extension, they will be updated across all your campaigns.