yank.el

(defun my-copy-region-advice (orig-func beg end &rest r)
  (with-silent-modifications
    (save-excursion
      (goto-char beg)
      (put-text-property beg (1+ beg) 'first-line-indent (current-column))))
  (unwind-protect
      (apply orig-func beg end r)
    (with-silent-modifications
      (remove-text-properties beg (1+ beg) '(first-line-indent)))))

(advice-add 'copy-region-as-kill :around #'my-copy-region-advice)

(defun my-kill-transform-function (text)
  (if-let ((indent (get-text-property 0 'first-line-indent text)))
      (concat (make-string indent 32) text)
    text))

(if (null kill-transform-function)
    (setq kill-transform-function #'my-kill-transform-function)
  (add-function :filter-return (local 'kill-transform-function)
                #'my-kill-transform-function))

(defun my-yank-transform-func (text)
  (evil-ts-obj-util--indent-text-according-to-point-pos text))

(add-to-list 'yank-transform-functions #'my-yank-transform-func)