Is there a word meaning positive envy in English?

envy should not be confused with jealousy. envy may be positive. The Cambridge dictionary has meanings similar to

envy = the feeling that you wish you had something that someone else has

Cambridge dictionary

This is not a negative verb. To say “I envy her good fortune” simply says that you wish for good fortune like hers. It is not to say “I am jealous of her good fortune”.

Jealous = unhappy and angry because someone has something that you want:

Cambridge dictionary

I conclude that you may use envy but that you should pay careful attention to context, particularly in circumstances where envy might be confused with jealousy, covetousness, admiration or esteem.

The correct answer to the question is one that is non-negative, that of holding high regard for the others accomplishments with the hope or dream of matching them. The term is Admiration to think highly of another and with the best of motives envy the bejesus out of them.

Technically “Envy” is a feeling of discontent and resentment based on someone else's possessions, abilities, or status. “Covet” is wishing, longing, or craving for something that belongs to someone else. “Jealous” is more commonly used as opposed to “envious” However, misinterpretations can still be made. I recommend adding context

Examples:

“that’s great that happened to you! I’m “jealous” “You got a new job? That’s great, I “envy” you

https://www.merriam-webster.com/words-at-play/jealous-vs-envious

To fancy? As an alternative to imagine: https://www.merriam-webster.com/dictionary/fancy

to form a conception of / to visualize or interpret as :

eg: I fancy your good fortune!