Tiktok mobile app has many more options like music, graphic that aren't available through api calls. Support buffers option to do notification posting via buffers mobile app.
There is one simple toggle that could be added to buffer app that changes this field:
schedulingType is a required field on the createPost mutation, and notification is one of its two valid values (the other is automatic ).
Calling the API (or Zapier or Make) directly sidesteps that, because you're specifying schedulingType on each post instead of leaning on the default.
The SchedulingType enum is documented in the API reference here:
And here's the notification publishing article again for the mobile app setup steps: