Where can you buy PayPal USD?

I'm curious to know, where exactly can one purchase PayPal USD? Given the popularity of PayPal as a digital payment platform, it's surprising to see that the option to directly buy its associated currency, PayPal USD, is not as widely discussed. Is there a specific platform or exchange that offers this service? Are there any considerations or risks involved in purchasing PayPal USD, compared to other cryptocurrencies or fiat currencies? Understanding the availability and nuances of acquiring this currency could be crucial for those interested in expanding their digital financial holdings.