Here's the Tweet kicking off the Twitter thread where this was announced:

Recuring bitcoin lightning network payments with Coincorner
#66537
https://twitter.com/CoinCornerDanny/status/1566743594010136576
https://nitter.it/CoinCornerDanny/status/1566743594010136576

Here's a description of how it works, from the Britcoiners by CoinCorner podcast.

Recurring Lightning Payments Are Here | Britcoiners by CoinCorner #55
https://www.youtube.com/watch?v=-00gQAzY6aA&t=807s