https://wccftech.com/2021-ipad-pro-get-up-to-16gb-ram-depending-on-capacity/

Last year, Apple limited its iPad Pro series to 6GB RAM, but a new year brings a wave of possibilities. The new iPad Pro family not only packs a punch in the specifications department but in the RAM category too. Users who thought 6GB of RAM was never going to be enough can upgrade to the latest models and get 16GB of memory in return. However, Apple did not tell you that there are two memory configurations available, which will depend on which storage variant you purchase.

Apple has divided its 2021 iPad Pro into two memory variants; one with 8GB RAM and the other one with 16GB RAM. Those who have no issues with 8GB RAM, you can easily save your money and invest in the 128GB, 256GB, and 512GB storage versions of any iPad Pro model. However, if you absolutely need 16GB of RAM in the iPad Pro, then you will have to either purchase the 1TB or 2TB capacity variants.