[8] In 2019, Johnson earned the bronze medal in the all-around at the Nastia Liukin Cup, and successfully defended her J.O.

At the conclusion of the (prematurely terminated) season, Johnson was named the SEC Freshman of the Year.

[12] On January 8, Johnson earned her third career perfect 10 on floor exercise in a meet against Arkansas.

[13] During the NCAA Championship semifinals, Johnson competed in the all-around, however LSU failed to advance to the final.

[8] On February 5, Johnson scored her sixth career perfect 10 on floor exercise against Auburn.

On January 19, she scored a perfect 10 on floor exercise in a meet against Kentucky, one year after she tore her Achilles competing on the same event against the same team.

She also tied for the SEC floor exercise title with Kentucky's Raena Worley and teammate KJ Johnson, all posting 9.975s.