Tekla Structures has its own 4D / 5D scheduling software.
Trimble Connect is only a viewer, but the ifc components can be assigned with time a date attributes.....when linked with a select range of Trimble products
You cant use MS Project or P6 at this stage you need to use a 3rd Party Software like Bexel Manager
BEXEL Manager - Trimble Connect - Power BI Data Exchange Workflow - YouTube or Asta Powerproject BIM