Lenovo is really good with drivers and such for their costly enterprise products which are mainly bought by governments, businesses and industry. They are, however, equally bad with Android updates on some devices. I own a Lenovo tablet which was, at the time, "their top of the line" consumer product, and it wasn't cheap. They neither updated the version of Android (it is stuck on 7.1.1) since I bought it, nor was the Android security kernel updated, which was already a year old when I got the tablet, leaving it vulnerable. Let me tell you, they left a lot of pretty P.O.'d owners, especially since they DID provide an Android update for their least expensive 10" tablet of the time. They are erratic at best.
I don't know what is holding up the P11. It is actually the first replacement for the tablet I bought years ago, so I am looking into it. It could be shortages of chips which is devastating high tech right now with most everyone, or maybe it is some licensing battle, who knows... they are not very transparent.
I own a number of Lenovo enterprise laptops, and they are built like tanks, use great tech, and are supported for years and years, they are just very expensive to buy. The one I am typing on is now 9 years old and running Win 10 and doing it well, so I don't mean to slag Lenovo products, but their support and customer service on the consumer lines is spotty at best.
The delay in the introduction in N.A. might ultimately be a gift, however, as they may consider updating the Android version before release. Also, the likelihood of high volume sales, with its features and price point might protect it from being forgotten when it comes to upgrades. One can only hope.