For those on iOS and is on a Premium TD user, you can utilise this app w/ TD’s calendar (I’m the developer) for the time being while things get sorted out w/ TD.
https://forums.trainerday.com/t/breakaway-indoor-training-ios-trainerday-wod-support-beta/
It’s a native iOS app and I’m using an iPad Mini 2 (2013) as my development device. There’s no subscriptions (currently) and there’s no Logins/Signups needed to use the app so you do not need to register for another app just to test it out.
Been meaning to upgrade it from TrainerDay Beta it to Official Apple, but got derailed into making additional connections to GarminConnect.