https://www.lufthansa.com/us/en/flight-disruptions
Flight disruptions – Q&As We make every effort to always get you to
your destination on time and reliably. However, if air traffic
disruptions do occur, if your departure gate is changed, your flight
is delayed or even has to be cancelled, you can find all the answers
to the most frequently asked questions here. You can find out whether
your flight has been affected here: current flight information.
https://www.lufthansa.com/us/de/passagierrechte
annulment
If the flight on which you had a confirmed booking has been canceled,
you also have the same rights of re-routing, assistance, reimbursement
and compensation as stated above.
However, they are not entitled to any compensation under the EU
Regulation if the incident is due to exceptional circumstances which
could not have been avoided by taking all reasonable measures. For
example, in bad weather conditions, political instability,
strikes, security risks, unexpected flight safety shortcomings.
My go to flight tracking website is:
https://flightaware.com/
In addition to current flights it includes a fight log of recent past flight performace. Of special interest while trveling, flightaware has a "Where is my plane now?" feature. Also helpful when flying a code share is the website identifies the opeartor's flight number.
Using United 9216 FRA to MXP as an example: https://flightaware.com/live/flight/UAL9216
United 9216 is opearted by Lufthansa as LH252 and the aircraft comes
from CDG as flight LH1029. LH252 was not affected by the work action
Oct 20 Sunday and was substantially on-time.