Nowadays you can write up what you really need to do, then ask ChatGPT to make BS OKRs out of them, with numbers to sound just impressive enough, but really easy to achieve even when you do the correct things unrelated to the OKRs.
You are asked to provide OKRs, everyone else are doing it and the only way not to do it is if you start your crusade or I guess just say "no" and see what happens?
Next, I'd say it depends. Sometimes an org is new to OKRs so gets pretty zealous about using it for everything. In this situation, assuming the org is trying to learn, the management needs to go through the pain and figure out what does/doesn't work.
Sometimes there's enough braindead thinking in the org, in which case, there's not much to do but I'd argue sending ChatGPT nonsense is probably worse than telling everyone OKRs are BS. You're better off doing your best and hoping for the best. If you're caught engaging with management initiatives in bad faith then I don't see it ending well.