Screenshot 2023-04-22 at 10 13 50

bbox_props = dict(boxstyle="larrow", fc=(0.8, 0.9, 0.9), ec="b", lw=2)

boxstyle Describes the shape of the box. Can be boxes or arrows.
fc Face color.
ec Edge color.
lw Edge line width.

t = axs[1].text(60, 10, "Text", ha="left", va="center", rotation=0,
            size=15,
            bbox=bbox_props)