Are you experiencing any issue in v14.0.0-beta.4 (version-14-beta) regarding the list settings view? + Add / Remove Fields seems to be missing in the Doctype Configuration dialog although fields_html is correctly displayed.
Yes, seems CSS issue here
frappe/frappe/public/js/frappe/list/list_settings.js
There is an issue reported on Github too
https://github.com/frappe/frappe/issues/16783