Paypal payment flow

Hi guys, does anyone have any experience automating the payment flow with Paypal? It's an integrated component on UI [we can't change it internally]. The yellow checkout paypal button is inside an iframe, when clicking it, it opens a new browser window and I can't seem to find a reliable way 1) to always click on this yellow button (flaky) 2) to switch windows from the main one to this window2 to interact with paypal login. When I use a Playwright recorder, it stops recording right after the need to focus on window2.