@SunshineDad2021 your wife sounds in the same boat as me... I am similar to @Knitonepearl.
Currently on mat leave (near the end) and I haven't made any friends. Fortunately I have two close friends who have also had babies. However, they both have LOADS of other people and social plans. I have met a couple of acquaintances, but they know each other very well so I am the spare part.
NCT group dissapeared / went quiet / never wanted to meet up, which was a real shame as we all got on so well. Or at least i thought we did, but the friendship was limited to a WhatsApp group that fizzled out. I'm trying not to take that personally. It is what others have said, it really is luck if you're put with people who have shared interests and actually want to hang out.
Baby classes = same issues with people being in groups or not hanging around. I tried three different classes, same issue at every single one. I am friendly and chatty (similar to your wife), however I overheard one woman calling me weird to another, which knocked my confidence massively.
I have past experience of being judged on my appearance, so I appreciate what you were trying to say about looks. The judging a book by it's cover really is a problem.
It has got a bit much trying to not be over confident and chatty (which is apparently weird), but not being completely introverted (which apparently is also weird).
I do go swimming, which I enjoy. It's a small group who are nice, but again, they know each other from their own NCT... it makes you feel crap when loads of other people had successful NCT groups they hang out with.
I have been upset about this on a few occasions. As in really upset. But now I've just started doing more casual activities
on our own, such as soft play. My son loves the soft play and play cafes and I've come to the realisation that if I'm going to do these things I just need to go and do them, even if I am a loner! I will also try church baby groups as I get the impression these sort of things are more welcoming (and affordable), and my little one can roam and play freely. I've only been to one play cafe where I've had a few stares for being on my own, but the owners were lovely and friendly.
At the end of the day the main bit that makes me sad is that my baby loves other babies and children, and I get the horrible feeling that I'm lacking friends with babies for him to socialise with.