You might look for specialized apps or software that offer such filters. Some are available on popular app stores.
You could try reaching out to artists or enthusiasts who have experience with this. They might be able to point you in the right direction. Another option is to explore different graphic design platforms that might have built-in manga filter options.
One way could be to search online for tutorials or guides on getting AI manga filters. Many tech blogs and forums might have helpful tips. Also, check out social media groups dedicated to manga and digital art for recommendations.