As for eligible plans, Celcom has made seven of them support eSIMs. They are:

XPAX™ Postpaid 50Celcom Mobile GoldCelcom Mobile Gold PlusCelcom Mobile Gold SupremeCelcom Mobile PlatinumCelcom Mobile Platinum PlusCelcom Mobile Family™

Signing up for an eSIM can be done at any Celcom bluecube store. It’s free of charge for new customers, as well as existing customers of over a year. For those who have been Celcom subscribers for less than a year, there is a charge of RM5. (Source: Celcom [1], [2])

Celcom Announces eSIM Support For iPhone XS  XS Max And XR - 96