Ana Dumaraog of ScreenRant gives it a 9 out of 10, noting that the first two episodes are surprisingly emotional despite the show’s switch to multi-cam. Georgie & Mandy’s First Marriage is a worthy replacement for Young Sheldon, Dumaraog says:

Steve Holland explains exactly when Georgie and Mandy's First Marriage takes place relative to Young Sheldon and The Big Bang Theory.

Mary and Meemaw return in Georgie & Mandy's First Marriage episode 1, but Missy isn't with them, raising questions about Sheldon's twin's whereabouts.