Glad you liked milkfish! The "white flesh" associated with the fish actually comes from the color of the flesh when it's cooked. If you looked into the cross-section of your bites into the fish, then you would notice that the flesh is very white. It's definitely eaten a lot here in the Philippines, and it's our national fish!
In Indonesia it's called ikan bandeng, one of the hardest fish to eat because the amount of bones it had, but it's really delicious, you can practically do anything with it, smoke it, make a simmer dish, fry it, soup mix, you can even make a fish ball out if it
In the Philippines, the most popular way of cooking the fish is called "daing" where the fish is marinated overnight with coco vinegar then fried with garlic bits. Another is "tinapa" which is just smoked fish. Both are usually eaten for breakfast.
not only with pressure Cook, but one of Magical way to cook Bandeng or Milk Fish is to make Otak-Otak Bandeng or you can say Stuffed Milk Fish We scrap all the meat without destroying whole skin and shape then mix the meat with other ingredient after that stuff the mixed meat back into the body
In my home town, Tainan, we have a number of milkfish recipes, such as milkfish congee, milkfish skin soup, etc. They're delicious; please do try making some.