Delivering those brags with confidence and style is crucial. There is a very fine line. Ultimately this interviewer has to like you, be confident in what you say and want to invest in you. Interviews are happening a little less and so each opportunity has to be grabbed, well-prepped for and the impression you leave must be on point!
Fast Company give some great tips to really polish up those brags:
https://www.fastcompany.com/90586308/how-to-brag-in-an-interview-without-sounding-conceited