Hi, please follow the below steps and get back to us with the results.
From the Lock screen or anywhere Favorite Cards are saved: Swipe up the Samsung Pay tab from the bottom of the screen. Swipe to the PayPal card and then select the desired unlock method. Enter your unlock credentials, and then place the back of your phone against the card or NFC reader.
From Samsung Pay: Open the Samsung Pay app. Select Wallet, and then select the desired PayPal card. Tap PIN or IRIS, and then enter the required security information. Or, if you have fingerprint security set up, just place your finger on your phone's fingerprint scanner. Then, place the back of your phone against the card or NFC reader.
Note: The NFC feature on your phone needs to be turned on.
I think Samuel462 was looking to find out how to add PayPal to his Samsung Pay...
from the instructions you have provided, it is based if PayPal is already added, when you say "swipe to paypal card" or Selecting the desired PayPal card from the wallet.
I dont believe PayPal is available for Samsung Pay Canada as of right now as I was not able to add my PayPal account to Samsung Pay either..
Even when trying to add a new "card" by putting in your paypal acccount it does not seem to work.