Work with team over time. Trust isn’t something established quickly, it can be quickly lost but not so easily gained.
Start with those already in trusted positions e.g. PO/SM and then work from there to influence the rest of the team.
Work with the team. Spend time with people listening and observing.
Default by trusting people up front and I often find they return it.
Be transparent and visible, be vulnerable.
Take the heat for other’s mistakes and protect team.