Is there the "JMicronATA.kext" in Big Sur?

Hi.

I'm investigating strange problems with an external Jmicron based USB-C box and, just for curiosity, I was checking if the "JMicronATA.kext" was in Big Sur (M1 Mac Mini). I can't find it, neither with Find Any File which looks also into the protected system folder.

Can someone tell me if should be there (or in Staged Extensions or whatever)?

Thanks

PS: neither in System Info -> Extensions