This prompted me to move away from Authy, and looking it up, it doesn’t allow you to export your TOTP tokens. There were some workarounds but then have been plugged, I tried.
Mostly switched over to Bitwarden’s equivalent. I’ve been using their password manager for many many years now and am very happy with it. They have an export feature in a few different formats.
The work around did work however you needed to download an older archived version that was unpatched.
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.