Here I do maintain a list of usefull apps for travelling. Together with the specific use case during travelling:
https://www.4x4tripping.com/2022/12/...s-im-2023.html
But yes, the planning of a trip is different to the usecase what app you will use during your trip.
You have to collect the legs of your trip at your own, you had to prove what is possible with your passport. What is possible with your restrictions when you start to considering security. A route planner will use too countrys like Irak, Afghanistan or Myanmar. Not any boarder is open, not any bordercrossing is open for tourists.
Or the routing will lead you through China without to tell you, that you may need an chinese driving licence, an additioal guide and a predefined route who will cost you cash (and a lot for preparation and paperwork).
Do you really need a detailed daily plan with mileage, or does it make more sence to start something like this with some months in your pockets.
Google did restrict their routing recently..
Here, one of my suggestions at the link above, is the better way - but you had to set what is possible at your own.
If you really want to do detailplanning, probably
tripline is to mention too. To collect useful
POIs for an extended trip, for not missing beautiful sightseeing, is another challenge..
Surfy