LH Group has published a new set of waivers (TWP 2012), mainly for tickets issued after April 20:
https://www.lufthansaexperts.com/sha...ile_147655.pdf
A cancellation remains the golden get out of jail card:
For customers who do not wish to take advantage of any of these flexible rebooking options, you can still submit tickets for refund-either per original fare rule or on involuntary basis in case of cancelled flights.Due to the current situation there may be delays in processing refund requests.