Cant do that with my banking app, payment app or government apps :(. Unfortunately where I live almost everything requires a phone.
To be clear I wouldn’t delete my banking app if it showed me a marketing notification, I would go into the app and turn off that kind of notification. I have notifications turned on for my banking app because of 2FA and transaction notifications. In the past I was actually able to stop a fraudulent transaction within minutes because of a transaction notification so I value them.
Unfortunately, companies know most people aren’t like us so they keep pumping out the crap.
You can't if it's a junk app. Many reputable apps today have properly described notification channels and you can turn them off selectively (under android at least). That's what I did for my banking and several other apps. Every "marketing" channel was turned off.