Can tourists buy UAE/Saudi K-pop tickets?

Yes when the platform accepts overseas cards. Keep the ID that matches the buyer name.

Is Weverse the seller?

Weverse may announce the show; the seat inventory is usually on Platinumlist or Virgin.

购票 · 중동 K-pop 콘서트 예매 (UAE·사우디)

海湾地区常见 Platinumlist 与 Virgin。