He has worn the yellow tie on a handful of occasions.
Here's a couple examples:
https://www.breitbart.com/politics/2020/02/24/donald-trump-addresses-roaring-crowd-of-over-100000-people-in-india-at-namaste-trump-rally/
https://www.india.com/news/world/us-president-donald-trump-tests-negative-for-coronavirus-white-house-issues-statement-3970239/
Not saying its not a message, just pointing out its not unique.