Need someone to reassure me he's okay

For context, my puppy died two months ago. It was so sudden and such a shock for us that I wasn't sure what to do and we end up burying him at a family's friend backyard. It was also Saturday night and there's not much services available where I live, at least from what I know.

I now regret it every day because he didn't know that place and his body is alone there. I don't visit because I'm not that close to this person, I assume I can ask but still...

I'm afraid to ask for exhumation, I don't even know if anyone does it here. I don't know what to do, I feel guilty for not cremating him or not burying him somewhere he knew. I heard their souls are not attached to the place their body is, but I can't stop feeling bad and guilty for not doing better.

Have you ever dealt with something like this?