Against the Cincinnati Bengals in Super Bowl LVI, Stafford and the Rams came away victorious on their home field with a final score of 23–20. Scoring started early in the first quarter thanks to a long drive that culminated in a Odell Beckham Jr. touchdown reception. The Bengals managed a field goal to make the score 7–3. Stafford then tossed another touchdown to wide receiver Cooper Kupp on the next possession to extend the lead to 13–3. On the first play of the second half, however, the Bengals retook the lead, 17–13. After field goals by both teams, the Rams trailed by a score of 20–16 in the fourth quarter. Stafford orchestrated a drive in the final minutes that ended with another touchdown pass to Kupp to regain the lead at 23–20. Overall, Stafford completed 26 of his 40 pass attempts for 283 yards, three passing touchdowns, and two interceptions as he earned his first championship ring in his first season with the Rams.
Who did Stafford throw touchdown passes to in Super Bowl LV?
The text provided does not mention information about Super Bowl LV. However, it does provide information regarding Super Bowl LVI.

In Super Bowl LVI, Stafford threw 3 touchdown passes, two to Cooper Kupp and one to Odell Beckham Jr.

In the first quarter, Stafford led a long drive that culminated in a Odell Beckham Jr. touchdown reception. Stafford later tossed a touchdown to wide receiver Cooper Kupp. In the fourth quarter, Stafford orchestrated a drive in the final minutes that ended with another touchdown pass to Kupp.