Perhaps she is so caught up and talks about it all so much that it hasn't crossed her mind that you and her hubby to be haven't actually met...

Why have you not asked "So when do I meet the lucky guy?"....

It's something I would've asked as soon as my BFF told me about a relationship getting serious, so just wondering why it is that you have not expressed any interest in meeting him.

On the wedding note... I feel you.

I wasn't in my best friends wedding either, and it hurt to be left out, but she has 6 sisters, so there really wasn't space for me in the wedding party. Logically I should've been her maid of honour, not her twin (they're oddly not close at all) and it was me who helped her prep everything and helped keep her sane, but family obligations run deep, and it would've looked weird to not have her twin in her wedding.

Anyway, enough about me, just sharing a similar experience...

If you really value this friendship, the way it seems you do, then there's no harm in talking to her. You don't have to admit to any negative feelings if you don't choose to, but you can at least start a convo about meeting her future hubby... It might open an enlightening dialogue.