iPad keyboard

Any bluetooth keyboard will work.

There is no specific smart keyboard for the 6th generation iPad being offered by Apple at this time.

If you want a keyboard case, look for one with specific compatibility for the 6th generation iPad.

https://www.amazon.com/s?k=Keyboard+6th+generation+iPad&ref=nb_sb_noss_2

For Apple keyboard compatibility with iPad, see:

Keyboards - iPad Accessories - Apple

In addition to Apple’s own keyboards, there are many third-party “folio” and bluetooth keyboards.

How about the Apple Smart Keyboard that they offer as an option for this iPad model?