Unfortunately, individual episodes like S01E11 are rarely sold on standalone discs. You will need to purchase on Blu-ray. Is it worth it just for this episode? Actually, yes, because the set comes with extras that streaming services don't have:
The Intersection of Faith and Logic: A Case Study of Young Sheldon Cooper Young Sheldon young sheldon s01e11 bluray
In this episode, the Church refuses to accept a donation from the Coopers after they suspect Meemaw (Annie Potts) of gambling. Meanwhile, the episode features one of the most interesting philosophical clashes of the season: young sheldon s01e11 bluray