There are two answers to that, or at least two aspects of an answer to it.
The first is that your idea is in keeping with what I suggested, which was that a regional approach to producing products to combat pandemics such as COVID is desirable, and this region includes the United States and Mexico. That's definitely something that I would encourage.
Whether these countries would be willing to merge their intellectual property regimes is a different question, and not one that I'm qualified to answer. I expect that countries like the United States are going to insist on maintaining control over their own intellectual property laws. That doesn't mean that we can't work out ways to share technology and co-operate with each other in areas where our interests are the same.