I emailed IZhO23 two months ago asking about details for IZhO23, and they finally replied.

IZhO23 will be an online event for international contestants on 1 — 10th February, but it will be an onsite event for Kazakhstani contestants on 1 — 4th February.

The participation fee for every contestant is 50$, and the deadline is on 30th December. For more info, see IZhO website.

Good luck to everyone participating :D.