I have it on good authority (today's Argus) that Percy is close to leaving.
Maybe that goal celebration at Luton was his way of saying the transfer would drag it's heals.
Percy rumoured to be heading to Al Ahly.
https://www.kingfut.com/2021/08/04/al-ahly-offer-for-percy-tau/
https://www.soccerladuma.co.za/news/articles/local/categories/players-abroad/al-ahly-open-talks-with-brighton-for-percy-tau/703291