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The ease of lip reading on display is an instant red flag in the anime. No, the one mistake she makes is NOT enough to let that slide either. It's estimated only 30-40% of speech can be lip read and it's even HARDER in Japanese. The majority of words are formed inside the mouth, not on the outside. Yuki's accuracy at what is mostly a guessing game is inhuman.
The way it was animated, it seems like Itsuomi is also over-enunciating his words, which actually makes lip reading even harder.
None of this even mentions how mentally exhausting lip reading is. It is VERY intensive to do. Don't believe me? Try to learn how yourself and feel your brain melt.
Here's a wonderful post from a deaf person if you want a first hand account on why this trope needs to be dead already: https://jennafischtrombea.com/2022/02/03/death-to-the-magical-lipreading-trope/