Sharing career updates with recruiters

I interviewed at a quant firm this year but didn't make the cut at the final round. The recruiter encouraged me to stay in touch with them for future opportunities. During our final discussion (almost 6 months ago at this point) I mentioned that I already had multiple offers in hand alongside a final round at Meta. The recruiter mentioned that they previously worked at Meta as a tech recruiter.

Fast forward to today and I got an offer from Meta, though I'm probably going to decline it for a lesser known decacorn. I'm wondering if it's worth mentioning to this recruiter that I got an offer from Meta, and how I should go about communicating this.