@Irene Gunning We do not have an ETA that we can share with you at this time regarding when the SharePoint functionality will become Generally Available (GA).
Microsoft has two main releases each year, //Build in May and Ignite in November. Since Ignite just happened, the next most likely window for updates would be //Build in May. Note that features can also be released outside of these two windows. Lastly, there is no timeline I can share publicly at the moment and development could very well extend past //Build in May, meaning GA might not come until sometime after.
We do invite you to share your feedback with the product group here: https://feedback.azure.com/d365community/forum/9325d19e-0225-ec11-b6e6-000d3a4f07b8
And you can follow along for release updates within Azure Search here: https://techcommunity.microsoft.com/category/ai/blog/azure-ai-services-blog