Hello there, Andriy. I'm here to point you in the right direction and get further help.
I've checked and couldn't find any reported or known issue about the standard field (Client type) being missing when pulling up Customers into Power Bi. I recommend reaching out to them about it. This enables them to investigate further and guide you on the things to do. You can find their contact information through the Intuit Marketplace, Here's how:
If you're all good with this, feel free to browse these modules for more information on processing payments online:
Please don't hesitate to get back here if you have clarification about this or QuickBooks. I'm just around the corner to help. Have a good one and keep safe.