Hi erikraynolds,
ASIL is automotive safety-related standard.We have many automotive products, such as S32 family, which are certificated with ASIL B. But MCX is industrial and IOT product which is not certificated ASIL. I suggest you checking this url and we will see more functional safety products.
https://www.nxp.com/products/nxp-product-information/nxp-product-programs/safeassure-functional-safe...
If we need ASIL B MCU, I suggest you considering S32K1
https://www.nxp.com/products/processors-and-microcontrollers/s32-automotive-platform/s32k-auto-gener...
Hope this will help you.
Jun Zhang