TikTok doesn't pay for listens or views. It pays for the videos users create with your music. The more videos are made with your track, the higher your earnings.
Each month, TikTok distributes payouts among rights holders based on how many new videos were created with their music. Your earnings depend on your tracks' share of all videos with licensed music created on the platform that month.
This means:
Both videos where the track was picked from the TikTok music library and videos where TikTok recognized your track in a sound uploaded by a user are counted.
TikTok earnings arrive roughly once a quarter, covering several months at once. So your earnings in your FreshTunes account may stay the same for a while and then arrive as a single amount.