I doubt Polanco has much trade value. Most teams have someone who can play 2B. His offense and defense are in gradual decline and he's currently an average player but second basemen tend to become unplayable overnight. You don't need to pay $10M for an average 30-year-old second baseman - Drury and Frazier each signed for $8M last year. They have other options (Farmer, Julien, Castro, Gordon, Martin) on the roster.
I think they ride out the season with Polanco and decline the option for 2024.