Starting next month, Meta will discontinue support for Quest 1 with regards to new apps. - Road to VR
Meta is Discontinuing Quest 1 Support for New Apps Starting Next Month
Meta announced last year that it will no longer support the original Quest headset, and starting on April 30th, new apps will not be able to offer support for Quest 1. Developers received an email outlining the changes, with Quest 1 support ending for new apps while system software maintenance will continue until August 2024. This decision marks Meta's progression towards newer VR headsets like Quest 2, Quest Pro, and Quest 3, which offer enhanced features. Visit Road to VR for the full story.
Source: https://www.roadtovr.com/meta-discontinues-quest-1-apps-support/