Not sure whether still same
Din fly since March

I will try this weekend and update once I have time

KLIA

For airport plaza premium lounge, Each eligible Citi Prestige primary cardholder is entitled to twelve times (12) complimentary access per calendar year.

Mastercard® Airport Experiences by LoungeKey is complimentary access for the primary Citi Prestige cardholders only. Fee of USD32 per guest per visit for guest visits will be charged to the Citi Prestige primary cardholder’s account.

So, no for Citi Prestige.

In case you want supplementary card holders also have the same benefits as primary, go Citi PremierMiles.

For Citi Premiermiles, “Eligible Cardmember” means the holder of the valid principal and supplementary and Citi PremierMiles Card issued by Citibank. And each card holder entitled 8x plaza premium lounge access.