>>6255695
Sometimes a character can just rail off, say something vague or wistful. Sometimes you can give a little glimpse of a reaction, or have the MC notice something shift or change without understanding what it means. Some QMs (myself included) even do little interludes from another's perspective, or with a sort of third-person limited omniscient zoom-out, to communicate the point. it varies.

Just be aware that anons are notorious for guessing or solving very elaborate puzzles immediately, and yet missing or misinterpreting fairly straight-forward subtext. You may eventually need to spell it out.