Do your persians walk with their tail down? Or is my cat unhappy?

My other cat walks with her tail high up in the air which they say is a sign of happy and confident cat. However I noticed my persian boy walks with his tail down. I researched about it and I read that persians hold their tail down and it does not equate to unhappiness for these cats. I was wondering if your persians have their tail down too? I’m worried if my little boy is unhappy.

For other context, he eats, plays, snuggles, and purrs , pees and poops normally. I don’t know if I’ just overthinking the tail positionw or an I missing something