Interesting comment about the slow warmup. Some of the videos discussing the engine oil being diluted by fuel on the 2017-2018 models mention slow warmup as a potentially contributing factor to the oil contamination. Note that 2019 & 2020 models seem to be free of that problem, but it is interesting that you mention the slow warmup of the problematic earlier models is still present. It wouldn't hurt to engage the services of an oil analysis lab at the next oil change for peace of mind.

Did you speak with your dealership about this issue, and would you be willing to put the answer they gave you here?

The 1.5 turbo engine in the Civic and CR-V are prone to the oil dilution problem causing engine damage. This usually happens in very cold or very warm weather. There was a recall and lawsuit: https://www.carcomplaints.com/news/2020/honda-oil-dilution-settlement-preliminarily-approved.shtml

Honda recalled all 1.5 turbo engines on Civic and CR-V from 2016-2019 for the gasoline leaking past the piston rings and into the oil pan, causing oil degradation and engine wear - and potential sudden failure: http://www.hondaproblems.com/oil-dilution/