So, I am using a asset that is from a different website but it has the CC Attribution License (AKA: I must give credit to the creator and give a link to the original content) but ROBLOX does not allow off-platform links? Would it be ok to post the link due to it being under a license or what other ways would I be able to give credit?
You can refer to this table for more information regarding what attribution you must include:
Source: License Versions - Creative Commons
The numbers in the collum head refer to the CC-BY License version.
A general summery is:
If supplied, you must provide the name of the creator and attribution parties, a copyright notice, a license notice, a disclaimer notice, and a link to the material. CC licenses prior to Version 4.0 also require you to provide the title of the material if supplied, and may have other slight differences. (Source: Deed - Attribution 4.0 International - Creative Commons
If supplied means if the creator of the asset included that information, you must include it as well. This also a includes URI (Uniform Resource Identifier) if it is reasonably practicable to include, meaning for Roblox, where external links aren’t allowed, you can exclude the inclusion of the URI, so long as you meet the other requirements.
You should refer to the license deed itself for more information.