Hi @lukhe welcome to the /e/ forum.
This seems to be a device where upgrade to the Official or stable /e/OS ROM beyond Android 11 (R) was stopped /e/OS stable sunfish download.
The only opportunity to Upgrade to Android 13(T) seems to be to change to a Community aka dev build type.
Download from /e/OS dev sunfish download. The official advice is to treat this as a new install Install /e/OS on a Google Pixel 4a - “sunfish” and upgrade the phone to manufacturer firmware to Android 13 (T) first
Before following these instructions please ensure that the device is on the latest Android 13 firmware.
Also available Android Flash Tool and GitHub - CalyxOS/device-flasher
I expect the old Android version is the reason.