When GNU screen is selected for inclusion in Buildroot, none of its terminal files (screen*) are installed. The problem is due to the Buildroot screen makefile only using the "install-bin" target of screen, which is a subset of the full installation target called "install". A fix could be to change screen.mk in Buildroot to use "install". Another fix could be to export the screen terminfo file(s) from the staging area in the build of ncurses.
Fixed by Gustavoz in git