Your phone is old it is time to upgrade. You maybe have max Android 10. Some of your hardware "has been expired" like it is not compatible with example modern paying NFC. Sorry dude, but it is time to buy a new one. 10 years old dude... It's time..
Sadly Samsung Pay has been replaced with the less functional Samsung Wallet. You should be able to install the Wallet app from Galaxy Store or Google Play Store. The Galaxy S10 will be supported two more years.
