A webmaster worried about having a lot of no-follow links from Pinterest. Google’s John Mueller said that these links do not have a negative impact on the rankings of the linked website:
I wouldn't worry about those links from pins. If that's where your audience spends a lot of their time, and where you can be visible to them (and perhaps get traffic from), then that sounds like a reasonable priority.
— ? John ? (@JohnMu) September 16, 2020
How to check the links that point to your website for free
You can check the links that point to your website for free at OpenLinkProfiler.org. The tool shows follow links, nofollow links, ugc, sponsored, and it offers many filters that help you to find the right links: