???
I guess define 'supernatural'; there's plenty of options in Pathfinder 2e for Martials that don't have explicit magical abilities, and are mainly super athletics, incredible inventors and investigators, perfect stealth machines, etc.
Don't drag them into this! Pathfinder 2e is a game where the Martial / Caster divide doesn't exist and has quite a number of ways to have non-supernatural based Martials! (Assuming that 'has magic items for support' counts.)
I didn't say Pathfinder has a Martial Caster trouble nor a lack of Martial options.
Just that like WOTC, Paizo puts more focus on the magic than the not magic.
Because designing casters, magic characters, and spells is easier and flashier