v0.10 is not to be confused with Android Q or Lineage 17.1.
It is the version number of the /e/ OS . You can check this post to find out what came as a part of v0.10
The Android Q version of /e/OS code is under testing. We expect to release test builds in a month 
This is the device road map as you can see the Pixel XL marlin is on the list due for a /e/Q update
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