Unfortunately, it is impossible politically to police this area of research. All that would happen is it would happen in more secretive government labs. The only reason we know about it happening is because the research was published.
Its not like this problem is exclusive to China. The anthrax in the ~2001 anthrax attacks was linked to a strain from US Biological weapons research[2]. Different circumstances, but lack of regulation and moderation in this industry is clearly a problem that has potentially world-destroying possibilities. Covid left a huge mark and had less than a 1% fatality rate.
[1] https://www.bbc.com/news/world-us-canada-66005240 [2] https://en.wikipedia.org/wiki/2001_anthrax_attacks