config.el

(defun my/org-metaright-or-evil-shift-right-advice (orig-func &rest args)
  "Overrides org-metaright if cursor is not at heading or item"
  (if (org-at-heading-or-item-p)
      (apply orig-func args)
    (call-interactively 'evil-shift-right))
  )
(defun my/org-metaleft-or-evil-shift-left-advice (orig-func &rest args)
  "Overrides org-metaleft if cursor is not at heading or item"
  (if (org-at-heading-or-item-p)
      (apply orig-func args)
    (call-interactively 'evil-shift-left))
  )

(advice-add 'org-metaright :around #'my/org-metaright-or-evil-shift-right-advice)
(advice-add 'org-metaleft :around #'my/org-metaleft-or-evil-shift-left-advice)