  Neutron star (NS) mergers provide us with information rich in physics using
multi-messenger astrophysical observations. One of the probable remnants of
such a merger is a differentially rotating hot hypermassive neutron star. The
stability of the merger remnant depends crucially on the underlying Equation of
State (EoS) and thus provides a method to probe the nature of dense matter in
NSs. In this work, we search for possible signatures of strangeness containing
matter in the NS interior on the secular stability of the merger remnant. We
also use recently proposed methods to make a rough estimate the collapse time
of the merger remnant and the threshold mass above which the merger promptly
collapses to a black hole.
