We take QuickBooks' performance seriously, @user16058. Let's explore a few factors that can reduce its operation speed and help you improve it.
QuickBooks Online (QBO) is a web-based service that relies on your computer or device's processing power, available memory (RAM), and Internet connection rate. Any deficiencies in these areas can affect its performance.
To enhance this, you'll want to use Google Chrome, as it provides the best user experience. If you're already using Chrome but still encountering the same issue, please ensure you have the latest version of Google Chrome by accessing the Chrome menu, selecting Help, and then clicking About Google Chrome.

Additionally, make sure your operating system is updated and meets or surpasses the System Requirements for QBO.
I'm including this article for more information: Why is my QuickBooks Online slow? It also has a Google Speed test tool that you can use to check your bandwidth.
As always, you can visit our QuickBooks Community help website if you need tips and related articles in the future.
That should cover it. If you still require additional assistance in improving your QuickBooks Online performance, leave a comment below, and I'll get back to you, user16058.