The vast majority of US companies support Planned Parenthood in some way, even if it’s just offering it as one option on a list of 500 charities that an employee can donate to via United Way or directly or with gift matching etc. You would have difficulty eliminating every company from your life that supports Planned Parenthood, unless you wanted to make some serious effort to source everything you buy.
My personal opinion is that unless a company is making it a big part of their business and marketing to go around promoting and supporting Planned Parenthood, and/or their business is directly connected to Planned Parenthood, I go ahead and use them. Paypal is a business for sending payments. It is not a business directly involved with health care, abortion, contraception etc. therefore I do not have a problem using them.
Paypal allows people to give charitable donations to organizations of their choice with no fees. I would assume it allows donations to PP. It also has a thing where it will suggest a charity for you to donate a dollar to when you make an unrelated payment for something else. It picks the charity based on where you have sent past donations, so if someone has been donating to PP in the past it may suggest PP. I never get invited by them to donate to PP as I have never sent PP a dime in my life and don’t intend to start, so instead Paypal invites me to send my dollar to a charity for rehabilitating abused cats to which I frequently donate.