The US hasn’t had a 200+mm howitzer in service for decades. We have mostly 155mm and 105mm.
200mm=8 inch. Never heard the 8 inch called anything else.
In a way MLRS/HIMARS are replacements for the 8-inch.
Its about the same weight of warhead vs an 8-inch shell.
Nice thing about a 105 is you can still fire them even with worn tubes, only problem with it is the rounds don’t necessarily go where you want them to.