Chris Haynes of Yahoo Sports reported the update Friday.
Thybulle was originally selected by the Boston Celtics before his rights were traded to the Sixers.
The 22-year-old University of Washington product showcased his well-rounded skill set while averaging 11.6 points, 3.8 rebounds, 2.0 assists and 1.2 blocks across five appearances during the 2019 Las Vegas Summer League in July.
He averaged 9.1 points, 3.5 steals, 3.1 rebounds, 2.3 blocks and 2.1 assists in 36 games during his final collegiate campaign with the Huskies.
While the Arizona native wasn't a high-volume shooter in college, he said following the draft that his ability to make an impact in other areas would help his transition to the NBA.
"Knowing your role is a huge thing in college and in the league," Thybulle told reporters. "I think that just preparing myself in college to know my role and be the best I can be at that role is going to set myself up well to be here."
Thybulle will head into training camp as part of a crowded competition led by Zhaire Smith and James Ennis for reserve minutes on the wing behind projected starters Josh Richardson and Tobias Harris.
It's unlikely the rookie is going to play a significant role for the Sixers right away barring a significant rash of injuries. But he does have promising long-term potential if he can become more consistent with his outside shot.