Uh, might be really bad timing on that integration there, as indeed PayPal has been a major missing option for Stripe for a very long time.

But that actually changed extremely recently. PayPal is now fully supported with Stripe, even payment settlement happens in Stripe, Connect is supported etc.

https://stripe.com/docs/payments/paypal

Its availability is limited - based on the merchant's Stripe account. It's not available in the US yet, but I can't imagine it'll be far behind. For EEA + UK + Swiss Stripe accounts, you can accept PayPal for US customers

It seems that it was launched very quietly, not crystal clear why. Maybe PayPal are trying to avoid cannibalisation of their own payment processing services