I want to leave google!
My Nova 5T need /e/ OS
how can install this OS on my HUAWEI NOVA 5T?
Regain your privacy! Adopt /e/ the unGoogled mobile OS and online services
…it’s always a good idea to share any resource you find to push builds:
https://forum.xda-developers.com/t/lineage-os-17-gsi-for-huawei-nova-5t-honor-20.4072185/
Anyway you have to unlock it first (refer to XDA), then you can try GSI builds.