@tert Our guy ignored puppy pads when we introduced pottying outside around that age too. I spent quite a bit of time on this subreddit trying to find solutions. Turns out, they’re still just little babies for the first few months. Their bladders are still growing and getting stronger, so accidents will happen.
Show your girl her accident, say “Potty, No” in a firm but neutral tone, then bring her outside to her potty area, and say “Ok, go potty!” in a happy tone. Say “Potty, Yes!” and praise her like crazy anytime she goes outside. Try to time when she potties after a big feeding or drink, then start taking her to potty when you’re guessing she’ll be ready.
The best thing we did for potty training that is paying off now that he’s grown is designating one zone of the yard for his potty. Now, even off leash, he’ll only go in that spot when he’s in the yard, leaving the garden and grass clean for us! We used a little dog fence to make a rectangle, and plopped him in here until he went potty and praised the heck out of him when he went every time. It was nice to just carry him out, let him down and carry him in when he was a baby without having to fuss with a leash. Eventually, he learned to walk with us to the pen that we modified to have an entrance, then later a U shape for a while, before removing it entirely.