Keep in mind, 2021-2022 stats like that are probably heavily based on early season troubles. Marcus was hurt, Jaylen was hurt, and Tatum's shot was off until January. Once they started playing right, they barely ever had any clutch time minutes.
I wish this were true but:
From January to the end of the regular season, Tatum's numbers were trash in crunch time. In 11 games, he averaged 1.5 points on an EFG% of 35.7 and a TS% of 48.5. Keep in mind, his FG% is 35.7 which means he didn't make a single 3 in crunch time. He also averaged 0.1 assists to 0.2 turnovers.
The good news is that he been better in the playoffs. In 5 games, he's averaging 0.8 points on 50% from the field but still hasn't made a 3. He's averaging 0.2 assists to 0.2 turnovers. His TS% is 69.4, which is excellent because he's been perfect from the line.