Helping baby crawl


My little one is 8.5 months old and not showing any signs of crawling and HATES being on her tummy. She seriously screams the whole time till she remembers she can roll over. Well she’s becoming a difficult baby because she knows what she wants but can’t move to get it. I’m encouraging more tummy time... 10 minutes every 2 hours but there’s no encouraging crawling, just calming her down the whole time. She has great head and neck strength and arm strength, she’s wanting to walk but just does NOT want to crawl! How can I help her? I’ve put her favorite toys infront of her, food, my phone, you name it. But it’s like she can’t do it! She stiffens her legs and won’t let me put her on her knees.