Does fiber affect the effectiveness of hormonal contraception?

By using birth control pills regularly at 21:00, can I supplement dietary fiber, e.g. psyllium / egg-shaped plantain the next morning, e.g. at 9:00? Internet sources show that they can not be combined with each other, but I understand that only immediately after each other and up to about 4 hours after taking the tablet. Once the birth control pills are absorbed, it doesn't weaken their effect, right? I greet and thank you in advance for your answer.