  The shear-banding instability in quasi-statically driven bulk metallic
glasses emerges from collective dynamics, mediated by shear transformation
zones and associated non-local elastic interactions. It is also
phenomenologically known that sharp structural features of shear bands are
typically correlated to the sharpness of the plastic yielding transition, being
predominant in commonly studied alloys composed of multiple different elements,
that have very different atomic radii. However, in the opposite limit
\remove{of high-entropy multicomponent alloys,} where elements' radii are
relatively similar, plastic yielding of bulk metallic glasses is highly
dependent on compositional and ordering features. In particular, a known
mechanism at play involves the formation of short-range order dominated by
icosahedra-based clusters. Here, we report on atomistic simulations of
multi-component metallic glasses with different chemical compositions showing
that the degree of strain localization is largely controlled by the interplay
between composition-driven icosahedra-ordering and collectively-driven shear
transformation zones. By altering compositions, strain localization ranges from
diffuse homogenized patterns to singular crack-like features. We quantify the
dynamical yielding transition by measuring the atoms' susceptibility to plastic
rearrangements, strongly correlated to the local atomic structure. We find that
the abundance of short-range ordering of icosahedra within rearranging zones
increases glassy materials' capacity to delocalize strain. The kind of plastic
yielding can be often qualitatively inferred by the commonly used compositional
descriptor that characterizes element associations, the misfit parameter
$\delta_a$, and also by uncommon ones, such as shear-band width and shear-band
dynamics' correlation parameters.
