Can we have a customized forms (New/Edit/Display) on Modern List? When I click on NewItem/EditItem the customized form should open at the center of the page instead of Right side. Is it feasible to achieve this or not? if yes, appreciate if someone can provide a bare minimum sample or detailed steps.
I’m afraid that is not possible since there is no
ListFormWebPart in modern experience.
You can see the supported customization in modern list form via this document: Customizing "modern" lists and libraries.
Related discussion: Can we center the Power Apps form like we do on InfoPath form?