2019ipad pro can support fast charging. The iPad Pro actually supports up to 35W of charging power. However, this phase lasts for a short time, and the iPad Pro will soon stabilize at 30W until the battery reaches about 80%. From 80% to 100% full, the power will gradually decline.
This proves that the iPad Pro can handle the 30W PD fast charge well, even if you use the 61-watt or even 96-watt head for the MacBook.