why not asking in the vintage forum or in the japan section?
here the question seems somehow misplaced.
but to answer your question:
popy produced many toys. mainly kaijus (robots) and also a wide variety of different figures.
but i guess you are asking only about vintage star wars popy figures.
therefore the answer is yes. the figures exists/were distributed in both tape and heatsealed baggies.
which baggie for which figure is depending on the figure.
e.g. boba fett came always in a heat sealed baggie.