I can't see script editor or content editor webpart in SharePoint online

ramanjjilunaidu  with out-of-the-box modern SharePoint Online Microsoft don't want users to add javascript or css to a page in case future updates they make to SharePoint break your site. So the script editor and content editor webparts are not available and cannot be used. They are only in the classic experience. I believe there is a github script which can re-add the script web part or you can build your own web part in SPFx but I don't know anything about that.

Rob
Los Gallardos
Intranet, SharePoint and Power Platform Manager (and classic 1967 Morris Traveller driver)