Expenses related to home renovations

Hello -

For a recent property sale, I do not have the necessary bills/receipts for improvements made to the home (Flat). Purchased the home in 2014 and made major renovations such as flooring, making the kitchen modular and adding Cupboard fixtures in all the 4 rooms (3 bedrooms + Main Room).

Since I do not have the receipts and unable to track down my bank statements, is there any other option (0nplace of the receipts) to claim these exemptions for capital gain calculations?

Is it okay /advisable to get these exemptions without the receipts?

As I purchased the property after 2001, is getting FMV from approved valuer an option here? If this is an option, should this FMV be used as cost of acquisition?

Could you please provide some insights and guidance here?

Thank you.