For a while post-introduction I was consistently getting Touchless on my DL trips but not on AA, even with the caveats in the AA-specific FlyerTalk thread of solo flight etc. I theorized it is due to a hyphenated name, which in my DL profile appears exactly as it does on my passport, but AA omits the hyphen and replaces it with a space (note that the hyphen appears in my AA _profile_ but not in my booking summaries or boarding passes.

However, on my last two AA trips, I suddenly started getting the Touchless indicator, so I assume that somewhere in the data chain something has gotten more relaxed about name matching.

Between this and other well-documented issues with things like credit acrd points transfer to airlines/hotels, etc. I will once again repeat my advice to expecting parents and spouses-to-be, don't hyphenate, you or your children will thank me later