Yes, the developers themselves embraced the community putting their characters in china tracksuits for seggs memes and posted this from an official account (one that focuses on developer thoughts and behind-the-scenes, not their marketing accounts). First time I'd seen that from a developer but it was pretty funny.
Originally owed to "Tracksuit Liv" from Punishing: Gray Raven, repackaged for Wuthering Waves. Generally tracksuit memes are attributed to Liv and Yangyang as the sort of mascots for their respective titles.