Just download original vector image from freepik.com, rotate 90 degrees, and combine more of them to create bigger background, no AI needed: https://www.freepik.com/free-vector/twigs-hop-seamless-pattern-with-repeating-images-malt-leaves-hand-drawing-white_11243902.htm OK, not exactly your pattern, but definitely from same author, you can search more on freepik, if not good enaugh.
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