Yup, it was the logo showcase plugin. Once I deactivated it, I was able to edit the homepage again.
Thank you for the help!
This is what the link looks like when I hover over the EDIT link:
/wp-admin/post.php?post=17&action=edit&lang=en&classic-editor
And to be honest, I’m not sure if that is the correct page ID. When I hover over the EDIT link for the logo — in the partner showcase module — it looks like this:
/wp-admin/post.php?post=4191&action=edit&classic-editor
So they don’t have the same page ID, yet when i try to edit the homepage, clicking EDIT under homepage takes me to the logo.