Can i masturbate externally (i know no internal) after bilateral laparoscopic salpingectomy surgery?

The nice thing about pleasuring yourself is your body will signal the limits of your activity. Going all the way to climax may trigger a painful internal response, so be aware and take things slow. You can likely get by with some without problems.

Yes. It should not disturb the operated area. Or you can wait till any discomfort is gone-5-&7 days