There is one old Dogecoin mixing service that existed before. I haven’t used it personally, nor do I know if they are very active or not. But back then, there was some speculation that the service offered privacy’ protection, which I don’t know how effective that is. Since it’s a matter of funds, you need to be careful. You can search on Google for “Dogecoin mixer.” But there were also several warnings from users who doubted the transparency’s legitimacy.

I have highlighted the first in your topic as to why it is waste of time and money to make Dogecoin transaction private. There are many privacy coins that can do the part and not all of them are being chased by the government agencies or are getting delisted from exchanges. If the government comes after all privacy focused coins there will be someone in these times who will come up with a new coin which will be completely untraceable.