I can see the importance of being able to process USD funds through our Merchant Services. While there isn't a time frame of when this option will become available, I highly encourage sending feedback to our engineers. To do this, click on the Settings icon and click on Feedback.
In the meantime, you're more than welcome to use third-party payment apps such as Square, PayPal, etc. The good thing is you can sync these apps to your QuickBooks account and this allows you to easily keep track of your transactions. You can search for third-party integrating apps on our site www.apps.com. Once you're on the site, enter the name of the payment processing app you're using and hit the search icon. I encourage you to go with the app that best suits your business needs based on the app description and reviews.
In case you have other questions, feel free to reach back to me in the comments below. I'm here to help.
As another option, open a USD and/or CAD virtual bank account at Wise. Your customers will be able to pay your invoices by using their USD credit cards.