If you’ve gone through this much trouble, it can be assumed you want to be here.

So the word “leverage” probably has nuance/context.

But as others have mentioned, only bring it up if asked, then leverage it.

And it’s just my advice, but use it as “leverage” that although you have an offer from XYZ and it’s a great job (don’t EVER say anything negative about an employer, current or potential future) but here is where I want to work” etc etc etc.

But that advice is ONLY worth what you paid for it

Otherwise, ask your interview prep service (is using one, again my advice). That’s what you DO pay them for.

It was 6 years ago, but that’s what the nice ladies across the street was old me.