Yes, split shares and bonus shares automatically reflect in holdings.
Avg price for a split depends on the split ratio. If it is a 1:1 split then the Avg price of your holding is reduced by half and the quantity is doubled. Your P&L after split shares are credited will remain the same.
Avg price for a bonus depends on the bonus ratio. If it is a 1:1 bonus then the Avg price of your holding is reduced by half and you receive additional bonus shares at Rs.0. The bonus shares can take upto 2 weeks to be credited to your Demat account. Until the bonus shares are credited, your P&L will show an artificial drop of approximately 50% in this case. Once the bonus shares at Rs.0 are updated in your account, the P&L will be restored to its correct value.
Steps on how to add bonus share price in Q.