I (30M) met a lady at my cousin's wedding in another country, liked her but didn't get a chance to ask for her number. My own fault. Would it be wise/strange to ask him to see if she'd be interested?

The gist of it is in the title. I've just arrived back in my home country after attending my cousin's wedding with his new partner in their home country, alongside most of her immediate and extended family. The night was fantastic, and had the opportunity to meet everyone from her side of the family.

In particular, I was seated next to a lady who I was able to strike up some nice conversations and get to know her a little before being separated by other events during the night. Unfortunately, she and her family left before I had the chance to maybe ask if she'd be interested in keeping in touch.

Now this all happened a few days ago, and I've never been in this situation before. My cousin sent a message recently thanking me for attending, and to keep in touch and welcome any time.

What would you all do?

Sorry if there's not enough info, I'll try my best to answer other questions.