Actually, the website also says (at https://www.lufthansa.com/de/en/flight-information):

Rebooking and refund options

Passengers holding tickets from Lufthansa, Austrian, Swiss, Brussels Airlines or Air Dolomiti, issued on or before 10 March 2026, and booked on Lufthansa-operated flights (including Lufthansa CityLine) on 12 or 13 March 2026, may:

• rebook free of charge to another Lufthansa Group flight between 10 and 23 March 2026 via the Lufthansa Help Center, or
• request a refund for their ticket at any time via the Help & Contact Center

We are currently experiencing a high volume of calls, which may result in longer waiting times when contacting our service centers. For urgent requests, we kindly ask you to make use of the digital services mentioned above whenever possible.

Lufthansa currently expects to largely return to the regular flight schedule from Saturday, 14 March onwards.