sharepoint designer – Editing xml of views in SP Online?

I’m needing to move a on-prem SharePoint application that I wrote 5+ years ago to SharePoint Online. When I did the development initially, I used SP Designer 2013 to edit the raw XML behind the views/forms. Since SP Designer has been retired, what is the current method to view and edit the raw XML behind views/forms?

(I’m aware there is push to use the GUI editing tools provided by SP Online, but I want access to the raw XML for the details that the GUI editor doesn’t do.)