Ask HN: Setting up Architecture Review process for large teams

What are some of the best practices that you have used to help ensure different teams within your organization are well equipped with their architectural decisions.

We have one Engineering Fellow that wants to ensure that engineers in all 4 teams across the company are well equipped to get feedback on their architectural decisions.

For now we are just holding office hours but as the teams grow this is becoming a challenge.

So wondering how others are setting this up.

For reference: each team is about 10-20 engineers.