There is still plenty of racism on reddit. Look up any thread about Indian, Chinese and Romani (Gypsy) people.
The Reddit admins only goes after racism when the target is people contemporary liberal media sympathize with.
They only banned anti-black racist subreddits and users after the 2015 Charleston church shooting. They only banned anti-Semitic subreddits and users after the 2018 Pittsburgh synagogue shooting. They only banned Islamophobic subreddits and users after the 2019 Christchurch mosque shootings.