Apple airpod max with iPad Pro?

Absolutely yes. To enjoy full supported capabilities, ensure that you have updated your iPad to the most recent version of iPadOS.

AirPods Max - Technical Specifications

AirPod Max Compatibility (extract)

iPad Models 

• iPad Pro 12.9-inch (5th generation)
• iPad Pro 12.9-inch (4th generation)
• iPad Pro 12.9-inch (3rd generation)
• iPad Pro 12.9-inch (2nd generation)
• iPad Pro 12.9-inch (1st generation)9
• iPad Pro 11-inch (3rd generation)
• iPad Pro 11-inch (2nd generation)
• iPad Pro 11-inch (1st generation)
• iPad Pro 10.5-inch
• iPad Pro 9.7-inch
• iPad (9th generation)
• iPad (8th generation)
• iPad (7th generation)
• iPad (6th generation)
• iPad (5th generation)
• iPad Air (4th generation)
• iPad Air (3rd generation)
• iPad Air 2
• iPad mini (6th generation)
• iPad mini (5th generation)
• iPad mini 4

See this page with tech specs and compatibility:--> https://support.apple.com/kb/SP835?viewlocale=en_US&locale=en_US

Regards

Giulio