Either my senior engineers or I had daily meetings with the young hires, and made ourselves available for virtual meetings when they had questions.
My former company required peer reviews before presenting results to the customer. Also, project managers were responsible for the results, so it was in their best interest to stay on top of the progress.
The process was developed as the company is small with regional offices. Even when I was working in the office, most of my team was in other offices. This setup has worked for nearly two decades, and is still going after my departure.
kudos