As I've said, I never say No to a work-related conversation. Practice matters. And it turns out, the numbers back that up.
"Technical interview performance from interview to interview is fairly inconsistent, even among strong candidates. Notably, as above, consistency appears to have nothing to do with seniority, pedigree, or anything else. In fact, only about 20% of interviewees perform consistently from interview to interview."
https://blog.interviewing.io/the-technical-interview-practice-gap-and-how-it-keeps-underrepresented-groups-out-of-software-engineering/