They need to wait until after ammo depots within 200km of the line and the Crimean bridge disappears, then announce it as "Oh yeah, we sent ATACMS last week"...
The ATACMS should have the same problem with bridges as M270/HIMARS and SCALP/Storm Shadow. They hit the road surface, punch a hole and the explosions happens below in the open.
It might be the best if Ukraine continues their efforts with their own developments e.g. via water, as they can easily damage the pillars and foundation of the bridge. Or even lift and destroy a whole bridge segment between two pillars, as we have seen in the past.
The ATACMS will certainly be of big use for storages and hubs far behind the front lines. But as the article writes: "It could be months before Ukraine receives the missiles, according to the official."