I understand how valuable it is to receive notifications that genuinely enhance your experience and support your day-to-day transactions. I have another way how you can turn off this notifications, image plus.
You can disable this by navigating to your
Settings menu and going to
Notification when using your mobile phone or tab. Please keep in mind that turning off this feature will also impact other incoming messages within the app, as there is currently no option to disable only the alerts for unreviewed transactions.

For more information and detailed steps, check these articles for your reference:
We’d love for you to share your feedback, as it helps our engineers understand how this feature impacts your business.
To submit your suggestions, please use the
QuickBooks Assistant in your mobile application. Your insights are invaluable in helping us improve our services.

Additionally, learn how you can apply new rules to your transactions so QuickBooks can automatically categorizes them. I've added this for you:
Create Rules to Speed Up Review in QuickBooks Self Employed.
You can always get back to us if you have any questions or other concerns with notifications or bank transactions. We're here to assist you further.