Today, we’re thrilled to announce the expansion of the fifth edition Systems Reference Document (SRD 5.2), which will include updated content from...
www.dndbeyond.com
"What about the SRDs for previous editions?
Because we still need to complete reviews on those materials before they’re released into Creative Commons, we made the decision to wait until after the 2024 rules revisions were released to begin reviews of those documents."
Personally, I have zero expectation of WotC ever releasing 3.0 or 3.5e material under CC. I would like to be wrong, but I do not have anything that would fall under the category of "hope". They simply don't have enough financial reason to follow through with it.
Only to say that we are still aware of the community's desire for 3.0 and 3.5 to hit Creative Commons and we haven't forgotten about that, but nothing else on that score to share right now!