Can I use sypper to download SOURCEs and build a package ?

I want to try compiling some packages myself. Does zypper provide a command for this after I do zypper si <package> ?

TY for your time. BD

No, not zypper, but rpm.
The command is called “rpmbuild”, run f.e.:

rpmbuild -bb xxx.spec

See also “man rpmbuild” for more information.