Of course, she will be attracting attention, because her lifestyle was being put the highest priority which is based on Japan.
If she adapt on the lifestyle of this world, she will not attract attention too much.
But, i understand her. Just by not eating bread or rice for 1 or 2 days, i am weakening day by day.
Let alone MC dont had a proper soy sauce, miso, mayonnaise, and other snack from Japan. She will attract attention because she brings all of that into this world, and the residents are being curious because its totally new to them...