In the beginning, Phil talks about taking a bike ride across the Mykonos which is in Greece and wonders why there were so many fathers and sons there. Unbeknownst to Phil and his dad, the Mykonos is a popular tourist area for gay couples.
When Phil enters Alex's room near the end, there is a Ms Marvel Volume 1, No Normal 14 poster on his right. This was the introduction of Kamala Khan as Ms Marvel.
Cam's remark about "I remember your hair being darker" is a callback to season 1 when Gloria/Sophia had dark hair.