The Osmo Reflector for iPad (2021) makes it possible to use Osmo with all thin/slim bezel iPads (iPad Air 4, iPad Pro 11-inch, iPad Pro 12.9-inch):

https://support.playosmo.com/hc/en-us/articles/4402833111575-What-is-the-Osmo-Reflector-for-iPad-2021-and-how-do-I-use-it-

If you haven't yet purchased the new reflector, we have a temporary workaround that may help you to use your slim bezel iPad with Osmo's original hardware. Please see the video below for instructions on how you may be able to use your iPad Pro 11-inch, iPad Pro 12.9-inch, or iPad Air 4 with your current Osmo New Base for iPad.

**Please note that this temporary workaround will only work with the Osmo New Base for iPad. These larger iPads are too wide to fit on the Osmo Classic Base for iPad.**

We recommend using one of the following for this temporary workaround:

1. Ticonderoga Pencil #2 
2. BIC Mechanical Pencil
3. Paper Mate Write Bros
4. BIC Round Stic/Round Stic Grip 

For reference, you can find a list of iPads that are currently compatible with Osmo here:
https://support.playosmo.com/hc/en-us/articles/115009542208-What-iPad-models-is-Osmo-compatible-with-