For fans who want to own the season permanently and watch offline without worrying about shifting streaming licenses, digital purchase is the best route. You can download the complete second season or individual episodes from the following major retailers: Google Watch Action Data
This response uses data provided by Google's Knowledge Graph Young Sheldon (TV Series 2017–2024) - Episode list - IMDb young sheldon s02 download
Before downloading, ensure that you're using a legitimate source and respecting the creators' rights. For fans who want to own the season