Comparison of two models with angular momentum transport coefficient α = 10⁻² outside of 5 AU and a lower value (α = 10⁻³; top) or a higher value (α = 10⁻¹; bottom) inside of 5 AU. We fix the initial planetesimal mass to M₀ = 10⁻³ M_E and the starting times between 0.5 and 5 Myr, to probe the effect of early collisional evolution. In the low-α case, we use δ = α = 10⁻³ to additionally probe the effect of viscous heating, which pushes the ice line outwards to 1.5–3 AU. Pebble accretion is strongly suppressed by the high temperatures in the inner disc and all planets ending up in this region have migrated from more distant orbits beyond the water ice line. In the case of higher α, migration is strongly reduced due to lower gas column densities in the inner disc, which suppresses the migration of super-Earths and sub-Neptunes to the disc edge. Lower-mass rocky planets form more or less in situ with this reduced migration.