I have a feeling that the iPad 10th gen is going to be almost identical to the iPad Air (M1, stereo speakers, 3 pin connector), and that this year's iPad Air will be the last one. The current Air is too similar to the 11-inch Pro, which probably hurt sales for the Pro this year.
If my guess is right, the price will probably be somewhere between the current iPad Air, and iPad 9th gen.
Makes sense for all iPhones to have A chips, and all iPads get M chips. Base model gets M1, Pros get M2 (and better features like 120hz, wireless charging, more ram, etc.