If I'm understanding it correctly, Kemono isn't set up to auto pull from Patreon. It requires a subscriber of Patreon to initialize a process to upload to Kemono. One artist that I like is still active on Patreon, but hasn't had a Kemono update since August 2025, for example.
Think Patreon relies on a subscriber sharing their credentials or feeding it the content in some way... plus it looks like it requires some manual push to run since nothing has updated for months. some with their onlyfans scraper coomer.