Save the date received but no invitation

Hi all, a friend of mine is getting married in April 2025 (in 4 months). I received a save the date over WhatsApp in May but have still not received an official invitation. To clarify our relationship, we're not very close, we used to be about 6/7 years ago in college but not anywhere. There was some falling out within the wider group of friends years ago and I kind of distanced myself from them because it felt like constant drama every time we all met up. However, we're older now, more mature and everybody is on good terms, I just don't see the bride to be or the wider group that much. I've moved abroad with my partner so that even more so impacts my ability to see the group. I'm still on WhatsApp group with everyone from our college days and bride to be wrote in there about her engagement. I was pleasantly surprised to receive the save the date as I wasn't expecting to be invited given that I had seen her in a few years. It's getting close to the wedding and I haven't received the actual invitation yet, nor has she asked me for my house address or email address, she wouldn't have either. I'm feeling anxious and awkward about the whole thing. Should I message her and ask her about an invitation?