$MLC price doesn't charge on MetaMask?

Indeed, the $MLC token price may not update correctly on MetaMask.

You can check the price of the token on CoinMarketCap or CoinGecko. The MLC price should be up to date on these sites.

$MLC on CoinMarketCap

$MLC on CoinGecko

Both sites have a mobile application that you can download.