Has solar system lost two planets or is the standard model for the formation of the solar system totally wrong?

Sabine Hossenfelder (see this ) told about a possible solution of a problem plaguing the standard model of the solar system. The model cannot explain the formation of planets as a gravitational condensation of a proto disk. The narrative discussed by Sabine is that actually 2 additional planets would have formed but would have been lost later due to collisions of the planets. TGD suggests an…