I have very flat feet and over pronated ankles. While it usually manifests in ankle soreness after long sessions (and a tendency to roll my ankle, though it usually doesn’t result in lasting injury), I bought the med spec iso ankle stabilizers and play with those. All foot soreness has disappeared. I can’t speak specifically for Achilles though.
I’ve also heard great things about the hyperice boot, specifically for Achilles, but can’t vouch personally