How can I mirror a PDF on my phone before a deadline?

I need to mirror a PDF, basically flip it horizontally, for something I have to print by tomorrow morning, and I only have my phone with me. Everything I’ve tried just rotates the pages instead of flipping them. Any ideas?

Honestly the quickest way on a phone is to screenshot the page, flip it horizontaly in your normal photo editor, and export it back to a pdf. Did that once for a vendor sign right before a deadline and it worked fine.