I assume you are referring to the 15 year old executive order 13382. This was an executive order which designated several individuals, organizations, and banks for "providing support for terrorists." It was out of the treasury department, and was sanctioning individuals, not claiming that we would kill them on sight. Government Fact sheet on it has this quote.
This is very similar to numerous Treasury sanctions which have targeted many people across the globe, including Putin's allies. We aren't going to kill any of them whenever an opportunity presents itself.
The FBI maintains a list of most wanted terrorists. Suliemani was not on it. If you review some of those terrorists, you may be able to understand there is a difference between hostile government officials who we typically sanction, and actual wanted terrorists we would take immediate actions to kill or detain, given the opportunity. Suliemani was in Iraq on the invitation of their prime minister in order to help diffuse tensions, and we assassinated him. Stop normalizing this shit.
As far as plater charges, we lost 12 servicemen in Iraq in 2019. 8 of them were to non-hostile incidents, one to small arms fire, and three to suicide bomber. The only reason to worry about Iran supplying weapons in Iraq is if there was an escalation, or as an excuse for revenge. Revenge is completely idiotic, particularly in a region that we invaded on false pretenses. Genocide would be the only way to end the conflict if we are basing our policies on revenge from the last 20 years.
Edit - looking at the website closer, in IRAQ itself, we lost four troops in 2019, one of them to small arms fire. The site was listing folks in Syria, Kuwait, SA, and even Germany.