How to ask a seller on Trendyol a question about an unavailable product?

When a product is out of stock on Trendyol, there is no «Ask a question» button.
However, I found a way to ask a question:

<product URL>/saticiya-sor?merchantId=<merchantId>

E.g.:

https://www.trendyol.com/cristina-re/mug-ivory-p-712553361/saticiya-sor?merchantId=654111

2024-08-07--21-01-10

2024-08-07--21-02-21

2024-08-07--21-04-28