How do I remove this stain from this jacket I thrifted?

I thrifted this jacket several weeks ago and didn’t realize until I got home that this stain wasn’t just dirt that could be brushed off. The return window has already passed, so returning it isn’t an option anymore. I’d really like to try removing the stain myself before giving up on the jacket. The branding on it suggests it might be from a concrete company, so I’m wondering if the stain could be dried concrete, cement dust, or some kind of construction material. Has anyone dealt with stains like that on workwear before? What methods or products might help remove it without damaging the fabric? Any advice would be appreciated.