Salam sheikh, I wanted to ask if one forgets to put water through the ear piercing if ghusl is still valid?
Ghusl isn’t valid if its an open piercing and water can get through it.
If u remember a little later, and u haven’t done anything that would normally break wudhu, then u can simply get water in the piercing and ghusl would be completed. The delay wouldn’t matter.
If u break wudhu, then ghusl has to repeated.