How much does PayPal Pay in 4 approve you for?

I'm curious about the approval process for PayPal's Pay in 4 service. Can you explain how much PayPal typically approves for a user to spend using this feature? Does it vary based on factors like credit score, transaction history, or the specific purchase amount? How does the approval process work, and is there a way to check my eligibility or potential credit limit before making a purchase?