How can you drive a Corolla without CNG? They are made for each other like, Adam & Eve, Beauty & Beast, Subaru & AWD, Naan & Chana and the list goes on.
Just do not get it installed in the CVT variants.
Btw- The CNG Corolla Grande in Thailand has probably custom Injectors. Do the job properly and you can even run Garbage trucks and Delivery vehicles on CNG- Seen plenty in Norway.