Not able to change my version or update minecraft on my phone

My minecraft game on my phone won't allow me to update it or change versions which stops me from joining others and unable to play with them . I have tried many different ways to try solve this issue such as deleting the game and downloading it again multiple ti.es , restarting My whole phone, searching if there is any updates that I need to do on my phone but absolutely nothing shows and I'm stuck on the same old version. I have tried to find other ways and watch lots of videos but nothing is working and I'm out of options. Do you k ow how I would possibly be able to fix this issue ????