Coin - Mutual fund for NRI

Hi,

For NRI to invest in Mutual fund using COIN what account should be opened?

PIS account required for NRI account to invest only in Mutual fund?
Anyother charges as it’s NRI account?
Does Zerodha has online account opening for NRI?
If possible give some information about taxation.

https://zerodha.com/z-connect/zerodha/open-an-account/nri-trading-on-indian-stock-exchanges