Albert welcome. If you find that additional fibre is beneficial for you, that’s great. We are very supportive of n=1 on the forum, as people are complex biological organisms and there’s a high degree of variability between what works/doesn’t work between individuals.
Just as fibre works well for you, through trial and error a lot of people on a keto journey have found the opposite. For some the answer is proper electrolyte balance, adequate hydration, exercise, caffeine- learning to differentiate between constipation and less waste owing to improved nutrient dense food intake.
It’s interesting to learn about what works well for others- minus dogma in either direction. The longer people eat ketogenically, the less important fibre seems to be.