can you update lay theme now?
then in the gridder, right click the collapsed row. click "set html class and id"
then set the id to for example: hello
then on another page create a link to that page, with #hello
for example:
https://mywebsite/mypage#hello
if you click this link or just enter this link in your browser, this should now open the page with the row expanded and scrolled to.
if you have any button on that page to expand that row, that button will get clicked automatically. then for example it should replace its text or collapse other rows. meaning any settings that are associated with that expand row button should work.
let me know if it works for you