dock apps

Some banks have apps... some don't.

Any app that you can download to your Mac can be added to the Dock.

In fact, even websites can be added to the Dock.

To do that, simply drag the website from the Safari address bar onto the Dock to the right of the separating divider.

Please see: Use the Dock on Mac - Apple Support

and: How to Add a Website Shortcut to Dock on Mac - osxdaily.com

As an example, my bank has a mobile app for iPhones and iPads but not for Macs.