As per section 12(8) of the IGST Act, the place of supply is outside India but still it is a inter State supply as per section 7(5)(a) of the IGST Act as below:
(5) Supply of goods or services or both,––
(a) when the supplier is located in India and the place of supply is outside India;
(b) to or by a Special Economic Zone developer or a Special Economic Zone unit; or
(c) in the taxable territory, not being an intra-State supply and not covered elsewhere in this section,
shall be treated to be a supply of goods or services or both in the course of inter-State trade or commerce.