Regardless of whether you had a gain, loss, or broke even, you must report these transactions on your tax return. You have to file the 1099-Bs and no, you can't file them in a later year. Your 2021 1099-Bs should be reported on your 2021 tax return and no other. If you file and don't include them, you'll get an inquiry with a request to file an amended 2021 tax return with the 1099-B information.
You want to enter those so your carryover numbers are correct. There is information reported there you will most likely need when preparing future tax forms when you exercise or dispose of them.
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