I had the same problem several times, including today, August 18, 2021 - no PayPal Credit link on my PayPal Summary/home page. However, I found the reminder email that I got from PayPal Credit a few days ago and clicked the link to make a payment. Yesterday it didn't work, but today it logged me into the usual Paypal Credit payment options page, where I was able to set up my payment. SUCCESS!
However, I'm also going to download my latest PayPal Credit statement PDF because it's one of the few places I can get my full 16 digit PayPal Credit account number. I'm going to use this to try a payment to PayPal Credit using my regular BillPay service, because frankly I'm tired of the difficulties with Synchrony's web-based tools for making my PayPal Credit payments.
Good luck and hope you manage to get your payment in on time.
Dunxter
