The official Pokémon TCG Twitter account announced that the new Pokémon TCG Live App which was officially revealed in September 2021, has been delayed till 2022.

@PokemonTCG Twitter Post

To provide Trainers with a more polished experience, the Pokémon TCG Live mobile soft launch in Canada, and global open beta for desktop, have been shifted to 2022.

We’ll have more to share soon on timing for both this testing period and the full launch of Pokémon TCG Live.

Additionally, some of you may have recently received code cards with Pokémon TCG Live branding as part of some Pokémon TCG products. Though Pokémon TCG Live is not available at this time, please know these cards are still redeemable in Pokémon TCG Online.

Source: https://twitter.com/PokemonTCG/status/1456320748117794819