Where can I plug in an Orbi?

> I have another range extender product, where the user's manual says
> that it cannot be plugged into an extension cord or surge protector, but
> rather must be plugged directly into a wall outlet.

   If you were to identify your "another range extender product", and/or
provide a link to its "the user's manual", then some non-psychic in your
audience might be able to explain that restriction, without resorting to
guesswork.

> Can the Orbi be plugged into extensions/surge protectors?

   I'd assume so, unless there's some similar restriction in the User
Manual for your (unspecified) "the Orbi".

      https://www.netgear.com/support/product/orbi.aspx

   Which "the Orbi" is your "the Orbi"?