I cannot find the announcement in a quick search, but instantnoodlep is one of the few devices to have been dropped from the Stable release channel, see also Different Build Types. /e/OS AOSP 11 (R) builds ceased not long after Android Security Patches ended in February 2024.
Development has been ongoing for the community=dev build, so you can now upgrade from AOSP 11 (R) to AOSP 14 (U) as indicated by @piero. See also Install /e/OS on a OnePlus 8 Pro - “instantnoodlep”.
This update of official advice Important Update: /e/OS is moving from AOSP 13 to AOSP 14 for 100 Community devices is significant to you.
Be aware that you will be making the change from
- Stable=official → Community=dev as well as
- a major jump from AOSP 11 (R) to AOSP 14 (U)