Do you use Search console? It shows you what sites are indexed or if there any problems.
What happen when u type " site: yourdomain.abc " into google?
Not all the pages are indexed according to Google Console.
Well then they are maybe too new and not indexed yet or there is a problem (which search console shows you if there is a problem shown when u test urls).
But there should be no technical problems when u use wordpress in a "normal" way and just publish posts without doing some technical stuff with code.
Also I hope u dont expect that u just need to make a website and all your posts will be shown easy on google - SEO isn't that easy.
If you want u can send me your URL via DM and I have a look over your site.
