One of my best friends barely talks to me anymore, advice?

So my 3 closest friends and I used to always keep in touch, we have a group chat together and we all hang out (or used to anyway) pretty frequently. We are all 25 and have been friends since elementary school.

When the quarantine started, we stopped hanging out for awhile and instead started to do a weekly video chat (all 4 of us). Shortly after that started was when the one friend, I’ll call her Alex, started to drift away. She started talking about this other girl she was hanging out with all the time, then started posting on Facebook about hanging out with this other girl a lot, which is totally fine except Alex started ignoring the 3 of us while posting all this. She would go weeks on end without even reading a single message in our group chat (or messages that we would send to her individually). They were on fb messenger so it shows if she’s read it or not.

Then after completely ignoring all 3 of us for 2 months straight, alex popped back in the group chat (completely ignoring all of our previous messages to her) and announced that she just found out she was pregnant. And I would understand if she had been pregnant the whole time she was ignoring us and was just waiting to announce, but she told us immediately after taking her first test, just a couple days after her missed period. We all congratulated her, then after that she would still ignore all of our messages, but she would occasionally send us something about her pregnancy. An ultrasound pic, complaining about morning sickness or other symptoms, etc. She continued to entirely ignore everything else we talked about, including my other friend graduating beauty school, getting a new job, and my other friend getting a new boyfriend.

We planned to go out to lunch about 2 months ago, and Alex actually responded and said she would come. So we all met up, talked about her pregnancy for awhile, then moved on and started discussing other things. Alex would go completely quiet unless she could interrupt with something pregnancy related, then quiet again. After that we started making more plans but Alex wouldn’t respond at all until like the day before and say she couldn’t make it. So then we would ask if she wanted us to reschedule so she could be there and she would never respond. A couple times we decided to reschedule and would keep asking her what would work for her, and she would never respond. The only time she has said anything to us since that lunch, it was only to let us know extremely last minute that she couldn’t come. Meanwhile she’s still posting all the time about hanging out with other friends.

The other 2 friends and I have talked about it and they also have said that she won’t respond to any of their messages. They aren’t bothered by it and just say that she’s busy with the pregnancy. Which I understand to a point but alex obviously has no problem making time for her other friends. She could at least message us back once in awhile even if she couldn’t hang out. My other friends think that we should continue to include her in everything anyway and that eventually she’ll come around. I disagree and have stopped trying to talk to Alex altogether. I feel that she’s clearly shown that she doesn’t want to talk to us anymore, and if she does want to talk, she can be the one to reach out to us instead of us always messaging her. What do you think?