OTA URL
Here is the updater endpoint, change device to anything and type to stable or dev: https://ota.ecloud.global/api/v1/device/type
https://ota.ecloud.global/builds/full/stable/FP3/e-1.2-q-20220725206061-stable-FP3.zip
https://ota.ecloud.global/builds/full/dev/FP3/e-1.2-r-20220727206630-dev-FP3.zip
Give it a try, adb sideload it.
Obviously back up best you can first in case there really is some other issue blocking /e/ from providing the update.