I found this on a different site
“Because the Stepien rule applies only to future draft picks, teams are still permitted to trade their first-rounders every year if they so choose, but they can’t trade out of the first round for back-to-back future drafts.
For instance, since the Celtics have traded their 2023 first-round pick to Indiana, they aren’t currently permitted to trade their 2024 first-rounder. Following the 2023 draft, the Celtics would regain the right to trade that 2024 first-round pick, since their ’23 first-rounder will no longer be considered a future pick.”