I think I found the answer:Maybe I was not looking in the right place but I couldn't find the existing Ocean bands (orange, white, dark blue and yellow) anywhere on the Apple site after the update.
You can match most bands with any Apple Watch Series 3 or later case of the same size.
40mm, 41mm, and 42mm bands are all compatible with 40mm, 41mm, 42mm case sizes. 44mm, 45mm, 46mm, and 49mm bands are all compatible with 44mm, 45mm, 46mm, and 49mm case size