A long time ago, someone asked me if I cared that a seller states if or how much tip/gratuity I left. I told them I didn’t care.
With the recent changes on 5r, I actually do care now. When or if a buyer, well, for me at least, gives a tip, regardless of the amount, it should stay private.
Thanking the buyer in a PM is more than adequate. It may not be the best to announce that you received and how much.
I buy both for business and personal. Truth be told, I really dislike everyone knowing what I buy and who I buy from, frankly, it’s no ones business except for me and the seller I’m working with.
I sell on Amazon and as a seller, I want & crave reviews because that’s how I’m able to rank. I want people to know what I’m selling. As a buyer, not so much. I especially don’t want one seller knowing what I or if I tip another seller doing same or similar work.
I’d just suggest you ask your buyer if they mind before making it public.