Kobe Bryant had a true shooting percentage of 52.1 in the NBA Finals between the 2001-02 and 2009-10 seasons.

kobe bryant 2001-02 to 2009-10 finals stats ts%
NAMESERIESGPTS%MPGPPGRPGAPGSPGBPGTPGFGMFGAFG%3PM3PA3P%FTMFTAFT%MINPTSREBASTSTLBLKTOVPF+/-
Kobe BryantKobe BryantNBA Finals2752.143.427.35.55.12.00.73.79.522.741.81.65.032.16.77.984.61,171736149137531999850
StatMuse has game-level data for true shooting percentage going back to the 1956 Finals.