Any plateing would add metal and weight! At 7.94g it's a light coin but would be within specifications for a sac!
Weren't there a few of these 2000's Sacagawea's accidentally struck on to "silver"CuNi 99 Susan B Anthony planchets?
I went to the bank about a year ago and a teller that I knew said she had a "gold" quarter that a customer gave her to deposit. Evidently, even plated coins can be deposited. She asked me if I wanted to buy it. I said yes. She asked how much is it worth. I said a quarter. She sold it to me for a quarter. I still have it and I like it.