LHC and dark matter implications of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>t</mml:mi> <mml:mtext>−</mml:mtext> <mml:mi>b</mml:mi> <mml:mtext>−</mml:mtext> <mml:mi>τ</mml:mi> </mml:mrow> </mml:mat

We investigate a grand unification inspired version of the minimal supersymmetric standard model (MSSM) based on a left-right symmetric <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mrow> <a:mn>4</a:mn> <a:mtext>−</a:mtext> <a:mn>2</a:mn> <a:mtext>−</a:mtext> <a:mn>2</a:mn> </a:mrow> </a:math> gauge group, incorporating Yukawa coupling unification and current phenomenological constraints. Utilizing a split soft supersymmetry-breaking parameter space motivated by flavor symmetries, we analyze the implications of recent results from ATLAS, CMS, LHCb, and dark matter direct detection experiments. Our numerical scans, conducted with and heno, identify viable low-energy regions consistent with third-generation Yukawa unification, the observed Higgs boson mass, dark matter relic density, and flavor observables such as <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"> <c:mi>B</c:mi> <c:mo stretchy="false">→</c:mo> <c:msub> <c:mi>X</c:mi> <c:mi>s</c:mi> </c:msub> <c:mi>γ</c:mi> </c:math> , <f:math xmlns:f="http://www.w3.org/1998/Math/MathML" display="inline"> <f:msub> <f:mi>B</f:mi> <f:mi>s</f:mi> </f:msub> <f:mo stretchy="false">→</f:mo> <f:msup> <f:mi>μ</f:mi> <f:mo>+</f:mo> </f:msup> <f:msup> <f:mi>μ</f:mi> <f:mo>−</f:mo> </f:msup> </f:math> and <i:math xmlns:i="http://www.w3.org/1998/Math/MathML" display="inline"> <i:msub> <i:mi>B</i:mi> <i:mi>u</i:mi> </i:msub> <i:mo stretchy="false">→</i:mo> <i:mi>τ</i:mi> <i:msub> <i:mi>ν</i:mi> <i:mi>τ</i:mi> </i:msub> </i:math> . Our findings suggest that while current bounds severely constrain much of the MSSM-like parameter space, substantial regions remain experimentally viable and testable in the ongoing LHC run and next-generation dark matter experiments.