Luke said he got accepted into the University of Oregon. Ty Burrell, who portrays Luke's father in the sitcom, went to the University of Oregon in real life, and is a huge U of O supporter. He gave the commencement address at the June 12, 2021 graduation ceremony.
Other than a walk on by a security guard and some background skaters at the ice rink, there were no guest stars beyond the Modern Family family members.