Channel synergies

[AnantChandra]

How can the synergy between TV and Facebook channels be modeled in PyMC-Marketing when both are run concurrently and may jointly influence KPIs? Given that PyMC-Marketing is fundamentally an additive model, are such interaction effects inherently captured, or must they be explicitly modeled?

If they must be explicitly modeled, what's the best way forward? Would appreciate links to any robust resources