Hi there, and welcome to \e\ community.
When you ask for a build, please try to simplify builder’s work by sharing sources trees.
For the Samsung Galaxy A71 4G the git to link seems to be this:
https://github.com/samsung-sm6150-devs
Hope that helps !
note: I personally prefer a “template” like this to post build requests → Oppo R9s/sk (CPH1607)