Meme usage from fandom and Xiaohongshu: 'I can [accept/stan/date] this'. Usually for attractive people, idols, food, or products. The literal meaning 'I can/I'm able' still exists, so context decides.
mistakes
As a meme, 我可以 must come AFTER what you're reacting to: '这男的我可以' ≠ '我可以这男的' (ungrammatical). Putting the target first is the whole point.