As a millennial, the Trek VS Wars debates always confused me. Star Trek is philosophy and political science class in a scifi, flavor of the week format. And Star Wars is fantasy in a science fiction setting. Why can't we all just love them for what they are?
Here we see Deeana Troi poking fun at how quickly a couple retcons about family and the force sort of ruin the first half of a New Hope. If Luke could call out to Leia at the end of ESB then how did Vader not know here?
In Vader sucks at noticing obvious things because nothing was planned and everything got reconned as they went along. For forty-five years.
It's absolutely shocking that the time-warped remnant of Vader can find his own face, let alone sense a force-sensitive daughter that wouldn't exist for years and wouldn't make sense for decades.
(Ignoring that it was all retconning) I think force sensitivity wouldn’t necessarily be an indicator of anything. Force users can probably detect some amount of force sensitivity from others, in varying amounts. Most people are probably weak, with a few standouts here and there. But latent force sensitivity probably doesn’t set off any alarm bells the way a “trained” force sensitive would. So if he had detected she had any training, like I assume force users somehow “guard” themselves against others probing, that would’ve set him off and he’d realize, she’s hiding something. Also, given that this occurs literally right after the events in Rogue One, he was probably more focused on retrieving the Death Star plans.
Luke would’ve had a stronger connection to Leia than Vader would’ve, given that they’re twins, so he would’ve felt a stronger pull than Vader. Vader is the kind of Dad that probably would’ve forgotten his kid’s birthdays and social security numbers.