Omegle seems to try to mitigate issues with nudity be creating two different sections for users to choose: one for adult content and one for normal conversations. Seems somewhat effective.
From the article:
It created a filtered channel, now known as Random Chat, designed to exclude nudity, alongside an Unmoderated channel.
Strangely, they intend to discontinue the unfiltered section in the near future.
The unfiltered channel remains popular, but usage is shrinking, and Ternovskiy plans to eliminate it by the middle of 2021.
My gut feeling is that will just lead to mature content creators attempting to trick the filter, and I imagine they will be successful.