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It doesn't make much sense to consider using LineageOS. It is completely different to GrapheneOS too.
GrapheneOS is focussed on providing secure and private mobile devices, and LineageOS is not whatsoever. LineageOS is also less private and far less secure than AOSP. If you're interested all of the latest UI/UX features, whilst still be relatively private and secure, then stock Pixel OS would be a better option.
For further details about the issues with LineageOS, see:
https://discuss.grapheneos.org/d/14304-harm-reduction-with-stock-os-or-lineageos-samsung-s10/9
LineageOS on an end-of-life device is highly insecure and lacks basic privacy. It doesn't qualify to even be on a list of reasonable options for privacy and security. You do not have basic privacy/security patches, failing the most bare minimum requirement. The next best option after GrapheneOS for privacy and security is an iPhone, not an insecure OS rolling back security from AOSP on an end-of-life device where they can't provide anywhere close to full privacy/security patches.