To reproduce on a Tumbleweed installation:

# zypper in dmd dub

sudo zypper in dub dmd
Loading repository data...
Reading installed packages...
Resolving package dependencies...

The following recommended package was automatically selected:
  phobos-devel

The following 4 NEW packages are going to be installed:
  dmd dub libphobos2-0_105 phobos-devel


# cat > main.d
import std.stdio;
void main()
{
    writeln("Hello, world");
}

# dmd main.d

/usr/lib64/gcc/x86_64-suse-linux/13/../../../../x86_64-suse-linux/bin/ld:
cannot find -lphobos2: No such file or directory
collect2: error: ld returned 1 exit status
Error: linker exited with status 1

as a workaround, installing 

# zypper in phobos-devel-static 

the main executable gets created