Hi mum, I went through this also when my LO always preferred one side, it can be quite common because babies tend to have a “favourite side” when sleeping. What I did was gently encourage the other side by placing interesting things like light or toys on the left side when baby is awake, and also alternating how I position baby in the cot so she naturally turns the other way. If you notice the head tilt is quite fixed or baby always resists turning left, I would also mention it to PD just to rule out tight neck muscles early, because the earlier we catch it the easier to correct.