Knowzen said:
Cruz Contreras animated this scene https://twitter.com/cruzencanada/status/1367699029845450753

gammaton32 said:
I think there's been a misunderstanding. I looked up Cruz Contreras and I only found VFX credits. Also here is an interview where Glen says he animated this sequence himself: https://deadline.com/2021/02/over-the-moon-director-glen-keane-netflix-animation-interview-news-1234693925/
Cruz probably did the CG cloth animation