Hi, I'm Elise, and I'd be happy to help with your issue.
I think you might be referring to encrypted dns, by being unencrypted (which is common) it means that someone could in theory intercept a list of websites you are visiting. Not the data of the transfer just the website address visited.
You can setup this up as encrypted, here is a guide for doing that:
https://www.thewindowsclub.com/dns-over-https-i...
Please let me know if you need any further assistance.
Kind Regards,
Elise
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.