Issue: table codes do not transfer

VaultWiki already has its own TABLE BB-Code with its own syntax. If you want to use a different TABLE BB-Code, you can try disabling the TABLE BB-Code in VaultWiki's Syntax Manager.

It's unfortunate that custom BB-Codes do not work when migrating forum software, but this is true both inside and outside of the wiki. If you imported any posts to XenForo that have TABLE codes in use, you would have the same problem. It's just something that needs to be considered when performing migrations.

VaultWiki's TABLE BB-Code has the same syntax under both vBulletin and XenForo, and so no special consideration is needed if you have been using VaultWiki's TABLE code.

Due to the above addon, my table codes work within xenforo. Just not within VW4.

Please mind that not only custom bb codes are missing, but also stock bb codes like 'list'

If the old TABLE BB-Code works properly within XenForo posts when the add-on is installed, but not within VaultWiki 4, then that is completely different than what I first gathered from your initial post (which was that there was not a direct conversion for a third-party vB TABLE code under XenForo, and that you wanted VaultWiki to be able to convert one third-party code to a completely different third-party code).

But if it's simply that a custom XenForo BB-Code (in this case TABLE) isn't parsing in wiki pages only, then that is probably a bug and I can look into it. If it parses normally in regular posts, but stops working when VaultWiki is enabled, then that is probably a bug and I can look into it.

Please clarify the symptoms.

The old TABLE bb code works properly within xenforo when the addon is installed, but not within VW4.
Custom Xenforo BB code as well as stock bb code is not parsing in VW4.

Fixed in the next release. Where VaultWiki had colliding tag names with custom BB-Codes, even if the VaultWiki code was disabled, it still was overriding the other BB-Code. Applies to TABLE. Some stock BB-Codes that were not working are also fixed per: https://www.vaultwiki.org/issues/3469/

I think its extremely confusing for users to have different table bbcodes. Either the VW table bbcode should work in forum or the table bb code in forum should work in vaultwiki.
Whichever method is preferable, should display legacy table code properly.