The current Mac Pro was released in December of 2019. Apples said they’d release a new Pro eventually. But they’re historically beyond slow at updating the Pro. They even invented the iMac Pro as a sort of tide-over before releasing the 2019 Pro. Also helpful to contrast this with TSMCs release cycle. Apple is so slow to update the Pro that they might just wait until the start of a “node cycle” at TSMC to maximize the time they can ship unchanged hardware on it.
Ie, going to be a long wait.