Is FET built on Cosmos?

I'm curious to understand the technological foundation of FET. Could you clarify if FET is indeed constructed on the Cosmos platform? I've heard rumors about this, but I'd like a more definitive answer. If it is, could you elaborate on the advantages that such a foundation might bring to the FET ecosystem? On the other hand, if it's not based on Cosmos, could you explain what technology FET does utilize and why that particular choice was made? I'm eager to learn more about this intriguing aspect of FET.