It’s fine to wear your medals on a suit. There are lots of examples on the web. I think of all the men who wouldn’t fit in a uniform haha.. my dad was thin when he was in the Marines. Then he got large. Now he’s very thin. But he is 94.
There were several men in that photo in suits with their medals on.
thanks for that. this bears you out - https://www.liveabout.com/uniform-wear-by-retirees-and-veterans-3356968