Maybe look in to sailfish os. It has android app support and so far (almost 3 years) whatsapp has worked for me without issues. Don't know about google maps, ha

Maybe look in to sailfish os. It has android app support and so far (almost 3 years) whatsapp has worked for me without issues. Don't know about google maps, haven't tried it but I did install microg and got my bank app to work on it.