The Military Watch, comparing satellite images, suggests that nine helicopters (four Mi-8s and five Ka-52s) were destroyed.
Source: https://twitter.com/MarcinRogowsk14/status/1714719455555584501
@MarcinRogowsk14
By comparing Planet Labs imagery taken on 29 September 2023, we can assume with some degree of probability what types of helicopters were lost. Apparently four Mi-8 and five Ka-52 were destroyed in the attack on 17 October 2023.
Since cluster munitions were used, a wide area would have been peppered with shrapnel. I'd argue that anything that wasn't destroyed is badly damaged enough that they're no longer fit for operations without repairs and maintenance.