Hi, Your idea is clear, but the phrasing needs a little correction. Here’s a more natural version for your caption: “I can’t focus during work hours.” or “I can’t focus while I’m at work.” Both sound natural and fit well for a casual social media caption.

“I can’t focus at work” would be better. We usually say “at work,” not “during work time.” “Can’t” is also more natural than “can not.” Your sentence was clear, just needed a small change. Keep writing :)