That's not how Bitcoin works. You're conflating receiving addresses with wallets. And in the PayPal use case, you wouldn't even see a single receiving address,

That's not how Bitcoin works. You're conflating receiving addresses with wallets. And in the PayPal use case, you wouldn't even see a single receiving address, as it's entirely opaque to that and it'd all be handled in some internal PayPal ledger. The receiver of the payment would only see a transfer to them denominated in local fiat currency. They might not even know the source of the funds was crypto at all.