I think it's more likely to be divulged by talk about the president or presidential candidates

Sure, because if somebody says they’re pro-Trump (or really, pro most Republican candidates these days), they’re not saying “I lean towards conservative views”, they’re saying at a minimum “I’m OK supporting Trump because his xenophobia/sexism/etc are lesser concerns to me than his views that I like”.

There are plenty of conservatives in tech. The problem is that the modern Republican Party is no longer guided by conservative principles.