The ornamental design for a displayscreen or portion thereof with animated graphical user interface, as shown and described.
FIG. 1 is the first image in a sequence for a display screen or portion thereof with animated graphical user interface showing my new design;
FIG. 2 is the second image thereof;
FIG. 3 is the third image thereof;
FIG. 4 is the fourth image thereof;
FIG. 5 is the fifth image thereof;
FIG. 6 is the sixth image thereof; and,
FIG. 7 is the seventh image thereof.
The uneven-length broken lines serve as a boundary of the claimed design and form no part thereof. The even-length broken lines, showing of the remainder of the display screen or portion thereof with graphical user interface, form no part of the claimed design. The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1-7.