maybe give comaps a go. it uses openStreetMap for its map data. i dont know what routing algorithm it uses or how it compares to google/apple but i do like how easy it is to start routes with this app. and if it goes off course is fairly easy to just tap another road and the click "add stop" to have it re-route

another plus is being able to download as many map areas as you would like, and unlike google its actually giving you the full map data (although i havnt used google maps in over a decade now but i remember downloading a map once but then certain POIs would only show up when i had data/cell turned on)

https://www.comaps.app