Native Currency of ETH Mainnet is MATIC instead of ETH?

It's weird that on my Metamask, native currency of ETH Mainnet is MATIC…

https://preview.redd.it/77w7nqi8079a1.png?width=1406&format=png&auto=webp&s=51bb369f48d5e06742e49cf3a2a0ffd5de2b3c7b

So, my ETH asset also shown as MATIC… (I actually have 0.0086 ETH on this Metamask account)Every time I approve a contract interaction, gas fee is also shown as MATIC (but the exchange rate is ETH)

https://preview.redd.it/haebq2gq079a1.png?width=1786&format=png&auto=webp&s=bd95942e7ec8928da565381f23fd925172b59e48

Any idea why? Thanks.

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