Matching a Polish frigate to Baltic operations

What kind of ship would suit the Polish Navy better than retiring U.S. Littoral Combat Ships?

A French light-frigate derivative adapted for shorter-range Baltic operations, with more of its space devoted to weapons.

Retiring U.S. Littoral Combat Ships are rejected as poor value for Poland, with new French light-frigate designs offered as a better direction. A Baltic adaptation would need less range than an ocean-going ship, allowing designers to devote more internal space to weapons. Endurance and armament should match local operating geography before a navy buys whatever an ally is shedding.