TER of FOF is 0.1% since it holds ETF which has expense ratio of 0.54%, total expense ratio for FOF adds up to 0.64%.
ETF is traded on Exchange and you can Buy or Sell anytime throughout the day which isn’t possible in FOF which is Mutual Fund and you have to make Buy or Redeem request before cut-off time.
In FOF you can do SIP which isn’t possible in ETF.
ETF is Exchange traded fund that’s why it is not available on Coin but it is available on Kite, search for “N100”.