Yes, according to the information brochure provided on the official website, they will be done so.
Quoting the exact paragraph from that notice,

De-reservation of Unfilled Seats:-

De-reservation of unfilled seats will be done in the NSR round of seat allotment as per the following polices.

• Unfilled OB category seats will be de-reserved and treated as OC category seats for allocation. However, unfilled OC-EW, SC and ST category seats will NOT be de-reserved.

• Unfilled OC-PwD category seats will be de-reserved and treated as OC category seats for allocation. • Unfilled OC-EW-PwD category seats will be de-reserved and treated as OC-EW category seats for allocation.

• Unfilled OB-PwD category seats will be de-reserved and treated as OB category seats for allocation. • Unfilled SC-PwD category seats will be de-reserved and treated as SC category seats for allocation. • Unfilled ST-PwD category seats will be de-reserved and treated as ST category seats for allocation.