Burberry Group PLC said Friday that comparable sales increased only slightly in the first quarter of fiscal 2023 as they took a significant hit from the effects of Covid-19 restrictions in China.

The British luxury-goods company BRBY, -4.73% said comparable sales rose 1% in the three months ended July 2, with retail revenue increasing to 505 million pounds ($597.2 million) from GBP479 million for the year-earlier period.

The FTSE 100-listed company said comparable sales rose 16% excluding China.

Sales in the Asian giant fell by 35%, as 40% of its distribution was disrupted by lockdowns in Mainland China, Burberry said. Meanwhile, sales in the Europe, Middle East, India, and Africa region rose 47% on the strong spending budget of its local clients.

In the Americas region, sales fell 4% against very tough comparatives, it added.

Burberry said it expects a currency tailwind of around GBP190 million on revenue and around GBP90 million on adjusted operating profit for fiscal 2023.

Write to Sabela Ojea at sabela.ojea@wsj.com; @sabelaojeaguix