Not able to download apps

 im using your iphone from many years

It is a wonderful experience using this iphone 

But from some times i go to appstore and try to download

Some apps they wont download as they require ios 14 or later

I know that my phone is on 12.5.7 software and wont receive any further 

Update but it is a request to solve the problem as i need those apps

Very necessarily and i dont have enough money to but a new apple device 

So i hope you will help me .