developers.google.com/search/docs/gu
> Googlebot uses a web rendering service (WRS) that is based on Chrome 41 (M41).
So that's why it's incapable of handling grapheneos.org/releases.js for grapheneos.org/releases.
Rendering with Chrome 41 in 2019 embarrassingly bad. It's from early 2015...
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You mean it wouldn't be able to connect to a server that only allows TLS 1.3?
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Not necessarily, since it may not be Chrome making the connections directly to the server. It definitely can't understand HTML, CSS and JavaScript features added after Chrome 41 though. In addition to not seeing the releases, it renders the navigation bar incorrectly for mobile.

