That being said, there are currently more than 300 different characters you can play as, including multiple versions of icons like Han Solo, Kylo Ren, Anakin Skywalker, Obi-Wan Kenobi, and so many more.
While you likely won’t be able to play as all of these characters throughout your playthrough, you will definitely get to play as a variety of them. Different characters have different abilities, and to complete all of the challenges and collect all of the datacards, you’ll cycle through them.
Source: https://www.distractify.com/p/does-lego-star-wars-the-skywalker-saga-have-custom-characters