In several countries in Europe, McDonald's has served plant-based alternatives for years. In Sweden they serve the McVegan, for example: https://www.mcdonalds.com/se/sv-se/product/mcvegan.html
https://www.max.se/maten/meny/green/
This, imo, is more important than serving the token plant based one, which on the other hand is better than zero. Gotta start somewhere.
edit: actually, all those linked above are non-meat stuff, all 13 of them.