Looks like that’s exactly what case makers like Spigen did!Either
- raw/caseless, or
- via a hole in the case like with the silent switch, USB-C / Lightning ports. Then the button remains uncovered & functional.
- Maybe case makers will have to reduce the thickness of their side bezels so you can reach the button…?
Hole in the case with tapered thinner side bezels near the button 👇🏻
Images’ source:

Spigen is ready to go with new sleek & stylish iPhone 16 Pro cases
Protect your iPhone 16 Pro with Spigen's updated case lineup, which features cool teardown designs and aramid fiber options.