One of the most prominent Tiktokers Khaby Lame
To answer the question, yes, Khaby Lame is a practicing Muslim.
He was born into a Muslim family in Senegal and has publicly confirmed his faith in interviews, stating he is a practicing Muslim. He has also shared that he is a Hafiz (someone who has memorized the entire Quran) and performed Umrah.
Here is a video shows moments during his Umrah performance :