Depending on how CBS wants to progress prequel's narrative, he can still come back to Medford for a while until he fully relocates to California for his post-graduate studies at Caltech.

Source: https://screenrant.com/young-sheldon-big-bang-theory-sturgis-plot-hole-fixed/

While some have cited the cost-cutting at Warner Bros. Discovery as a potential reason for this, the aforementioned HBO spokesperson insisted that reducing the episode count for the prequel's sophomore season was a story-driven decision.

Source: https://www.cbr.com/house-of-the-dragon-season-2-shorter-episode-count/