I only ever used Authy as a single-item TOTP vault for BitWarden, but I moved off of it long before they ever mentioned the Windows app shutdown due to dissatisfaction with the UI. I just didn’t like their “card-like” interface, and they never offered a super-compact list-like interface. The card interface just wasted too much screen real estate, even on a desktop, and it just got immeasurably worse under mobile.