The United Nations Human Rights Committee has included the ERA in its concluding observations and recommendations for the US (see page 5), bullet point numbers 18 & 19. Here's the text:
18. While welcoming the various measures taken by the State party to advance gender equality, including the establishment of the White House Gender Policy Council in 2021, the Committee regrets the lack of explicit guarantee in the Constitution against sex and gender-based discrimination (arts. 2 and 3).
19. The State party should redouble its efforts to guarantee protection against sex and gender-based discrimination in its Constitution, including through initiatives such as the Equal Rights Amendment. The State party should also consider ratifying the Convention on the Elimination of All Forms of Discrimination against Women and its Optional Protocol.