PayPal's security bots are pretty sharp these days, they will spot the same browser fingerprint or IP address in a heartbeat and might limit all your accounts at once if they smell something off. The trick is keeping each login in its own isolated environment with a unique browser profile and a steady IP, so the system sees them as separate businesses run by different people. A proper guide on how to create multiple PayPal accounts and manage them securely without tripping their fraud filters is laid out in this article
https://gologin.com/blog/multiple-paypal-accounts/ .