Didn't wait long enough for tung oil to dry before applying wax - can I just leave it be?

Tung oil will cure perfectly well under a buffed-out layer of any wax polish. Wax finishes are very thin as normally applied and full of microscopic pinholes, making them extremely permeable, so the oxygen necessary for curing has no difficulty in getting through (just as water can).

And I'll let you in on a dirty secret of wood finishing, nobody who uses wax as the final stage in their finishing regime actually waits for their oil-based finish to cure because nobody is waiting a month or more for the wax to go on :-) So in fact it's perfectly normal to apply wax on top of only partially dried oil finishes.

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You didn't ask about this but I wanted to address it:

half citric oil (for thinning the tung oil and facilitating absorption)

For future reference thinning oils with a solvent doesn't do much or anything to aid penetration, except possible on end grain where it doesn't matter because penetration into end grain is already deeper than required.

Note on citrus solvents: while these are, at least in part, genuinely made from citrus peel the product isn't nearly as green or safe as it's made out to be. So personally I don't use that citric solvent anyway for the same reason I don't use genuine turpentine; the toxicity of d-Limonene and turpentine are pretty similar.