How to access iframe content using puppeteer?

Question

Chromium

Colleagues of the good time of the day, I ask for help if anyone has come across similar problems. I'm making a bot on nodejs + Puppeteer. The bottom line is, at a certain moment, the bot performs an operation, presses a button, an iframe is loaded in the form into which some content is loaded by scripts without urls. And here and there Blocked cross origin, how to get around this problem. Does anyone have an opinion, thanks in advance.