I asked the same question in a message to Enpass customer Service and got the following answer:
"If you want to purchase Enpass as a Gift, then please contact the respective App Store. As App Store itself handles all payment-related (License distribution, Refund, Purchase cancellation etc.), and we have no control over it. Pratyush Sharma (email@example.com)" 01/02/2020
I wanted to to find out if Enpass had a Gift Certificate option as LastPass does but this reply makes me understand that they don't. This would be a good sales opportunity for Enpass.