Board Thread:General Discussion/@comment-27086914-20190429204437/@comment-34888194-20190429204912

Bans are applied to the person, not the account. If someone has been global banned, they should wait until their ban expires. Then, they are permitted to come back again and edit. Trying to make alt accounts to circumvent the ban will also resulted in global banned, as well as increase the ban length on the original account.

So no, it's not okay to come back and edit while the original account of yours is still banned, no matter how long the ban is. If someone wanted to appeal their block, they can do so via Special:Contact. That's all I will say.