The name change was to eSwatini, with a small e, but you wrote Eswatini. This is a trend I noticed in the months after the change - people started out using a small e but then gradually transitioned to a more normalized spelling. Now almost everyone writes Eswatini.
I suspect the same will happen with Türkiye. For a while people will write it with ü but then eventually it will become Turkiye, without the diaeresis.
It can also be used as marker of the health of your opensource locale library.