This is a "nothing burger"....
It's been telegrpahed for months, like many other calculated decisions by the West. Ukraine no longer has large quantities of ATACMS, SCALP-EG and Stormshadow. GMLRS and JSOW are mid range weapons that will do nothing to impact Russian assets and infrastructure. JASSM was never approved for transfer, which furthers adds to the lack of long range Western weapons in the inventory.
USA
strategically waited for months to allow Russia to reposition it's long range strike aircraft and enhance the air defense at their bases. The impact of this decision will be minimal barring a significant surge of standoff weapons for Ukraine, which I very much doubt happens at this point.
This decision has only now been made because North Korea is actively joining the war and USA is looking to help Ukraine create balance.
If Ukraine had 500 long range cruise missiles and ATACMS in their inventory, this would be something real. My guess is that as of right now they have maybe 100 (non-domestic) long range strike weapons at their disposal. That includes a combination of Stormshadow, SCALP-EG and ATACMs.