I didn't formally verify it, but during the Russian internet blackout, r/conservative was very quiet. I assume that the responses you read on that forum are not from actual US conservatives. After reddit purged most conservative subs (in 2 waves, when Trump 1 began and when Trump 1 ended), I don't think you'll find any conservative subreddits.

Unfortunately, I haven't found a forum that's accessible and with lots of conservatives. You have some on X and you have YouTube channels. Both are harder to engage with.