The link is broken or the post is removed. If it's true , then it means one thing. Trump might be trying to suspend every entry for now or there's a threat somewhere regarding a possible attack. I'm going to look more into the news and edit my post but what you just mentioned is unusual , they can't just suspend activities all of a sudden, there has always been fear of insecurity but what happend has to be a result of some leaked plans or threats.
Edit:
I just did and found out Visa issuance from the USA has been partially suspended since February 2026.
The current is trully as a result of the insecurity but it seems they've been receiving more and more threat recently:
LAGOS, March 10 - The U.S. embassy in Nigeria warned American citizens of a possible "terrorist threat" against U.S. facilities and affiliated schools in the West African country in a security alert late on Monday.
Below is the one about your post :
The U.S. highlighted threats from Islamist insurgents in the northeast, criminal gangs in the northwest and ongoing violence in parts of southern and southeastern Nigeria, including oil‑producing regions
Till further notice. It means fix your country and guess what those in charge of fixing are currently busy with three 2027 campaigns.