There isn't (yet) a tenth generation iPad Pro - so you clearly don't have one - or considering a case intended for it. Perhaps you instead refer to the recent tenth generation iPad?
For information, all models of iPad Pro 11" share the same external dimensions - although there are differences in the dimensions of the rear camera "bump". Recent cases designed to the iPad Pro 11" will fit the earlier models - where the reverse might not be true.
The much older first generation iPad Pro 9.7" and 12.9" had substantially different dimensions - as did the 10.5 iPad Pro (effectively a second generation iPad Pro). Cases designed for these models cannot be used with any other model.
In short, unless a case is explicitly designed for your older model iPad Pro (?), it won't fit.