TL: DR
iPad Pro is already overpriced for rather limited set of features and ports that come with it and iPadOS in its current shape and size. Wait for M2 iPad reviews, if you can live without iPad Pro for another 4-12 months and then decide for yourself if those extra few hundreds of $$$ are really worth to pay for M2 iPad Pro.
Slightly longer reply -> Given that Apple rised prices on both M2 MBP 13 with no other changes to the stale design and on new, refreshed M2 MBA, probably due to chip shortages, inflation and "new redesign" for the next big, shiny thing, I presume that M2 iPads might get more expensive as well, tho IMHO they are already overpriced as they are thanks to lack of ports and limited ipadOS(which might get what some folks want with iPadOS16 update, but we will see) and overly expensive and lacking Magic Keyboard.
Thus you could get M1 iPad Pro if you really MUST have one for your workflow and convenience and can score one at a decent price.
If its not a burning issue then you could wait until release of M2 iPads and see for yourself if paying extra for one is worth it or not.
I love my M1 12.9 Pro, yet, after one year of owning it I can wholeheartedly say that its way too overpriced no matter how good looking and working it is.
Perhaps not as much overpriced for USA buyers with constant sales and upgrades/buybacks, but for me, in N-Europe with already high prices on everything, I would, if I would want to get one today, probably steer towards M1 iPad Air in combination with either regular M1 Air or M1 Pro 14" Macbook for the best of both worlds. Situation was a bit different a year ago when I got myself 12.9, so there are plenty more choices for iPad/laptop buyers today.