I don’t get flirting; if you’re interested, just be upfront
Speaking only for myself, I know I’m not good at guessing games and I don’t like being unknowingly tested. If someone actually is interested and wants to get to know me better via a date, just tell me directly.
Edit: jumping back in to add that I’m not autistic or on the spectrum (or at least never been formally evaluated or diagnosed), and I do know how to generally engage with people.