You’ve got to get the bar all the way down to your chest, bro!

Partial range repetitions have their place in advanced training (though more so with squats and deadlifts I’d argue), but for the vast majority of us, full range of motion exercises win every time. This article (https://pubmed.ncbi.nlm.nih.gov/31567719/) shows that even with advanced lifters, you get more out of a full range bench press than any partial range. Some gym bros love to load up the bar and then drop it half way to their chest and grunt it back up and call that a rep, but if it doesn’t touch your chest, it’s not a bench press, in this gym bros opinion anyways (all genders can be gym bros, yo!)