I’ve generally seen this happen when Google crawls the site before the page was ready. If you’ve checked and updated the SEO settings of the page, you can manually request a recrawl , which can take a bit for it to show on search engine results.
This article may help as it mentions other things that could be affecting it, such as custom code.
P.S. I tried searching for the site on google but I didn’t see any results and the site seems down. Not sure if that’s expected at the moment.