OPT FL not taking SAT into account?

[Skyrock]

Hello,

when flying in south east Asia, there are currently (and also in general, but especially now) really high OAT at altitude. You can generally observe ISA+20 temps up there. Still, the OPT FL shows FL up to FL380 and higher even though the climb performance is abysmal, even with CLB and no Auto-derate. Is the OPT FL even taking the OAT into account?

Best regards,

Martin