Poco X6 Pro should support it. Are you using custom ROM? Official Xiaomi HyperOS/MIUI ROMs should have Tango translator which translates 32 bit instructions into 64 bit allowing to run 32 bit apps despite not having native hardware support. Most AOSP based custom ROMs don’t include Tango so wouldn’t run apps.
edit: nevermind, apparently Poco doesn’t include Tango binary translator for some reason, at least from what I read.