I don’t know about those borked font glyphs, but this is likely a Unity Package Manager barf spew problem, which I have scribbled out about in the past:
Recent versions of unity have an annoying habit of crapping useless packages into your project. When those packages inevitably have errors, this sort of thing happens. I have railed about it before.
Go into the package manager and remove crap you don’t need, like the entire test runner and collab and whatnot.
If you feel brave you can hand-edit the Packages/manifest.json file a lot faster than using the laggy package manager interface that only lets you remove one package at a time:
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