Sorry, I had done so but reverted back to the first code you sent as the updated one made the first text block of the section that triggers the dropdown look wonky (see screenshot) and the button at the bottom was not functioning correctly. It would close the section, but the 2nd last block would still be showing after collapsing using the bottom button.
I had to revert back so that the site looked right for the client. I've gone and duplicated everything on a test site:
https://yellow-giraffe-grl3.squarespace.com/what-we-do
Password: duya
Thank you