Your original question was how to carry over a capital loss from 2021. But looking it over again I just noticed that you also said you did not file for 2021. If you did not file, then you don't have any loss to carry over. It's not clear when the capital loss originally occurred. You absolutely have to file for the year that the loss occurred, in order to establish the loss, even if you don't file for all of the intervening years.
I would follow the advice that you found at CountingWorks and file for every year.
