You are not going to find a working Faceit spoofing method on this forum, and I will explain why
You can spoof your entire PC in a relatively safe way, including CPU, ARP, NIC, RAM, GPU, TPM, and everything else. The problem is that Faceit uses TPM attestation. That means they do not just read your TPM serial, they actually validate it. When you spoof TPM the common way, like people do for Valorant, it cannot pass proper TPM attestation
Real TPM spoofing that bypasses TPM attestation is extremely rare and private, for obvious reasons. It requires deep knowledge and serious research in this field. The few people who actually have a working method do not share it publicly. They only share it with trusted individuals. So no, you cannot properly spoof for Faceit unless you have a way to bypass or handle TPM attestation
The most recommended approach in this case is to use an Intel motherboard with an 11th gen CPU. That way, you can generate a new TPM serial by flashing the BIOS, and TPM attestation will not be an issue