I've used the trick where you transfer the money from your bank to your Apple Cash account... then pay the Apple Credit Card account from Apple Cash. THAT method is instant (or reasonably so). The longest I've waited is about 5 minutes.
I've also paid direct from my bank (not using the Apple Cash as an intermediary) and had that happen instantly as well.
My other half has the same bank ... and the payments can take anywhere from 3 - 10 days ... even though the bank will show they pulled the money almost immediately.
Keep in mind folks... your bank does not "push" the money to Goldman Sachs... when you make a payment using the Wallet App... Goldman Sachs "pulls" the money from your account. So when you watch your bank balance reflect the payment, GS already has your money... they're just not giving you credit for it.
THAT is why GS is doing a scam.
While they do this, they're dragging Apple down with them. Apple shouldn't put up with it.