Formation tracks compiled from 100 individual single embryo simulations (M_emb = 10⁻² M_⊕) with varying initial locations r_start spaced uniform in log between 0.05 au and 40 au for our exemplary disc discussed in Section 2.1.5. The tracks are coloured by migration regime. Time evolution of the planet’s accretion rate (core and envelope) and migration rate are shown as an example for a planet with r_start ≃ 20 au.