Thanks for clarifying that for me.
As you can imagine iPad cases are specifically designed to fit particular models, considering not just screen size but also dimensions, camera placement, and button locations. Therefore, a case for an older model, as you experienced, may not be compatible.
Given the recent release of your iPad model, compatible cases might be limited at the moment. However, accessory manufacturers typically update their product lines to accommodate new devices. I recommend regularly checking reputable retailers to see what they have to offer.
In the meantime, to protect your iPad from scratches and minor impacts, I suggest that you consider using a universal tablet sleeve or a soft pouch until a precise-fitting case becomes available.