ISO eBook app w/ single tap to hear individual words

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I'm looking for an iOS eBook app where I can single-tap an unfamiliar word to hear it pronounced.

I know about the iOS Accessibility Spoken Text feature (workflow: long-press on word to highlight it, then tap "Speak"), and I know about the Kindle app's feature (workflow: long-press on a word to highlight it, then swipe right twice, then tap 🔉 icon).

I want this feature specifically for emerging readers, reading at home without a one-on-one instructor hovering to help with tricky words, so a single-tap would be SO nice!