I too was trying to find alternatives to these services but I could not.

I saw a github “thread” ones for organic maps, but it did not get traction… They could make it a paid service as that are trusted by the community to handle that data.

There was a new application, I do not remember the name of it… But it was using google play services which I did not add to my OS.

I found the app through howtomen’s YouTube channel, let me know if you need it, I will search for it.

Edit: If you have the skills, you could setup/self-host owntracks, which I could not do, securely.