TikTok does not give apps access to its sound library. If you want a trending sound, use drafts:
- In OLO, under “When it goes out”, choose “Send to TikTok as a draft” and press the button.
- Within moments you get a notification in the TikTok app (in your Inbox).
- Open the draft, add the sound, text and effects, then post directly from TikTok.
For drafts, the caption and settings are chosen in the TikTok app, not in OLO.