Yes, you can connect your BNP Paribas account to QuickBooks Online banking, Paul. However, it's important to make sure the bank is supported by QuickBooks before you move forward.
Before setting up an account, double-check if it’s compatible by comparing the bank’s website URL to BNP Paribas within QuickBooks’ supported list.
Take a look at the screenshot below for guidance:

Also, if your BNP Paribas account is in a different currency and you're using the US version of QuickBooks Online, you'll need to turn on the Multicurrency feature to make the connection work. Keep in mind that once the Multicurrency option is enabled, it can’t be turned off later.
Once everything is fine, you can then proceed to connect your bank account to QuickBooks Online.
I’d also like to introduce you to QuickBooks Live Expert Assisted service! This service connects you with our team of experts who can guide you through the setup process, resolve issues, and make sure your bank account is connected correctly.
If you have any questions or need help, please feel free to hit the Reply button. We’re just a message away!