there was no public information about Timothy Olyphant fulfilling a childhood dream while working on "The Mandalorian." However, please note that my information might be outdated, and there may have been developments or interviews with Timothy Olyphant after that time.
If you are referring to a specific event or statement made by Timothy Olyphant , I recommend checking more recent sources to get the most up-to-date and accurate information. Entertainment news outlets, interviews, and official statements would be reliable sources to look for such information.