Hello,
Thank you for contacting us and sorry for any inconvenience that might have been caused due to that.
We’ve checked your website on Google with site:
operator and we can see that about 1,340 results are coming from your website:

In this case, can you please share some affected page URLs with us so that we can check the issue further for you?
Meanwhile, please check your Google Search Console coverage section to determine any issues reported on your site: https://support.artlogic.net/hc/en-gb/articles/360016851260-Google-Search-Console-errors-and-coverage-issues
You can share the error message or take a screenshot using this tool and add the link here so we can check as well.
Looking forward to helping you.
Thank you.
Can you check my robot.txt if it’s working fine?
Many of my posts were deindexed
My url is rehabjam.com
Hello,
Thank you for your query. We will be super-happy to help you with your concern.
You’re robots.txt is currently configured fine as you can see in my screenshot below:

However, if you visit the robots.txt directly in the browser, the txt file gets downloaded, and it could be that some bots are served with a different configuration of robots.txt:

Kindly check with your hosting provider what causes this behavior or you can follow this guide to troubleshoot it.
Also, can you send us a link to a post that was deindexed?
Can you send us a screenshot of the errors you are seeing in your Search Console for those deindexed posts?
We hope that helps and we are here should you have any follow-up questions.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.