This is the PoW scheme that Monero currently uses:

> RandomX utilizes a virtual machine that executes programs in a special instruction set that consists of integer math, floating point math and branches. > These programs can be translated into the CPU's native machine code on the fly (example: program.asm). > At the end, the outputs of the executed programs are consolidated into a 256-bit result using a cryptographic hashing function (Blake2b).

I doubt that you anyone managed to create an ASIC that does this more efficiently and cost effective than a basic CPU. So, no, probably no one is mining Monero using an ASIC.