Grass patch & potty training

Hi! I have an 8 week old dachshund puppy and so far she’s been really good with potty training except one thing… she will ring the bell to go outside on our patio but will pee on the patio instead of the fresh grass patch. I tried gating off the patio to make it smaller so the grass is the only option but she still chooses to go on the cement. It’s not necessarily a problem since she’s going outside but still the grass patch is right there! When she starts to potty I will move her to the patch but seems like she just liked rolling and playing in the grass instead of potty! Let me know if anyone has some useful tips or tricks 🙂