I haven’t analysed adani stocks in particular but deferred tax arises due to time difference and as a result either they will create DTA or DTL, basically either they pay tax in advance(DTA) and when they reverses it later on taxes might become negative or vice versa
Every company has some DTA/DTL but there might be cases that they are not as large as adani does and basic meaning is that deferred taxes are created due to differences in income tax rules and accounting rules
Surely it could be the case of set off of previous losses with the current profits as well but that affects income taxes and not depreciation as there is no effect of loss set off in books of account other than on income taxes.
Full information can be found in notes to accounts of the related figures and tax calculations for income. Tax purposes as well